2,847 results match your criteria Macromolecular rapid communications[Journal]


3D Printing of Photocuring Elastomers with Excellent Mechanical Strength and Resilience.

Macromol Rapid Commun 2019 Feb 19:e1800873. Epub 2019 Feb 19.

State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.

Three-dimensional (3D) printing elastomers, as a combination of transformative technology and widely used materials, have received great demand in many fields. However, commercial photocuring elastomer inks for 3D printing usually exhibit poor mechanical strength, inferior resilience, and lower elongation at break. In this study, photocuring inks that can be employed for digital light processing 3D printing are developed with acryloyl-modified polyethylene glycol (Acryl@PEG). Read More

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http://dx.doi.org/10.1002/marc.201800873DOI Listing
February 2019

Asymmetric Wide-Bandgap Polymers Simultaneously Improve the Open-Circuit Voltage and Short-Circuit Current for Organic Photovoltaics.

Macromol Rapid Commun 2019 Feb 19:e1800906. Epub 2019 Feb 19.

Beijing National Laboratory for Molecular Science, CAS State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry Chinese Academy of Science, Beijing, 100190, P. R. China.

A trade-off between open-circuit voltage (V ) and high short-circuit (J ) becomes one of the most vital problems limiting further improvement in polymer solar cells' (PSCs) efficiency. In this work, two asymmetric polymer donors PBDT-F-2TC and PBDT-SF-2TC are designed and synthesized. When blended with a state-of-the-art acceptor IT-4F with low lowest-unoccupied molecular orbital level, simultaneously high V (up to 0. Read More

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http://dx.doi.org/10.1002/marc.201800906DOI Listing
February 2019

Nanoscale Film Morphology and n-Type Digital Memory Characteristics of π-Conjugated Donor-Acceptor Alternating Copolymer Based on Thiophene and Thiadiazole Units.

Macromol Rapid Commun 2019 Feb 19:e1900005. Epub 2019 Feb 19.

Department of Chemistry, Division of Advanced Materials Science, Pohang Accelerator Laboratory and Polymer Research Institute, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea.

Various molecular weight π-conjugated donor-acceptor polymers based on thiadiazole and thiophene units are investigated with respect to nanoscale film morphology and digital memory performance. Interestingly, all polymers reveal excellent n-type digital permanent memory characteristics, which are governed by the combination of Ohmic and trap-limited space charge limited conductions via a hopping process using thiadiazole and thiophene units as charge traps and stepping stones. The digital memory performance is significantly influenced by the film morphology details that vary with the polymer molecular weight as well as the film thickness. Read More

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http://dx.doi.org/10.1002/marc.201900005DOI Listing
February 2019

Redox-Responsive Nanogel with Intracellular Reconstruction and Programmable Drug Release for Targeted Tumor Therapy.

Macromol Rapid Commun 2019 Feb 19:e1800824. Epub 2019 Feb 19.

School of Chemical Engineering and Technology, Shanxi Key Laboratory of Energy Chemical Process Intensification, Institute of Polymer Science in Chemical Engineering, Xi'an Jiao Tong University, Xi'an, China, 710049.

A tumor-selective drug delivery nanogel with redox-responsive size swelling and co-instantaneous drug release is developed. The nanogel is formed by poly(ethylene glycol) diglycidyl ether and cystamine double crosslinked hyaluronic acid (HA). The disulfide bond in cystamine (Cys) is in charge of the responsiveness, while the compact polymer network turns the nanogel a capsule for effective drug loading. Read More

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http://dx.doi.org/10.1002/marc.201800824DOI Listing
February 2019

Effective Separation of Enantiomers Based on Novel Chiral Hierarchical Porous Metal-Organic Gels.

Macromol Rapid Commun 2019 Feb 13:e1800862. Epub 2019 Feb 13.

College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan, 250014, P. R. China.

Metal-organic gel (MOG) matrices with tunable pore sizes ranging from micropore to macropore, derived from microporous metal-organic coordination polymers (PCPs), has attracted great attention for their enhanced pore accessibility compared with the multifunctional PCP materials themselves. The enhanced pore accessibility of chiral MOGs is especially imperative for mass transfer applications, including enantioseparations and purifications. Here, for the first time, a novel hierarchical porous MOG-coated SiO , derived from a chiral metal-organic coordination polymer, is employed as chiral stationary phase for effective high-performance liquid chromatography (HPLC) separation of enantiomers. Read More

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http://dx.doi.org/10.1002/marc.201800862DOI Listing
February 2019

Functional Brush Poly(2-ethyl-2-oxazine)s: Synthesis by CROP and RAFT, Thermoresponsiveness and Grafting onto Iron Oxide Nanoparticles.

Macromol Rapid Commun 2019 Feb 12:e1800911. Epub 2019 Feb 12.

ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, 3052, Australia.

Brush polymers are highly functional polymeric materials combining the properties of different polymer classes and have found numerous applications, for example, in nanomedicine. Here, the synthesis of functional phosphonate-ester-bearing brush polymers based on poly(2-oxazine)s is reported through a combination of cationic ring-opening polymerization (CROP) of 2-ethyl-2-oxazine and reversible addition-fragmentation chain transfer (RAFT) polymerization. In this way, a small library of well-defined (Đ ≤ 1. Read More

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http://dx.doi.org/10.1002/marc.201800911DOI Listing
February 2019
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Ultraporous Membranes Electrospun from Nonsolvent-Induced Phase-Separated Ternary Systems.

Macromol Rapid Commun 2019 Feb 12:e1800880. Epub 2019 Feb 12.

Département de Génie Mécanique, École de Technologie Supérieure, 1100 rue Notre-Dame Ouest, Montréal, Québec, H3C 1K3, Canada.

Electrospinning of nonsolvent-induced phase-separated ternary (NIPST) systems has gained a lot of interest due to its potential to produce (nano)fibers, which are superficially and internally porous with nanoscale surface roughness. Membranes produced from such systems are expected to have a high specific surface area (SSA; e.g. Read More

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http://dx.doi.org/10.1002/marc.201800880DOI Listing
February 2019

Flaw-Insensitive Hydrogels under Static and Cyclic Loads.

Macromol Rapid Commun 2019 Feb 10:e1800883. Epub 2019 Feb 10.

John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.

New applications of hydrogels draw growing attention to the development of tough hydrogels. Most tough hydrogels are designed through incorporating large energy dissipation from breaking sacrificial bonds. However, these hydrogels still fracture under prolonged cyclic loads with the presence of even small flaws. Read More

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http://dx.doi.org/10.1002/marc.201800883DOI Listing
February 2019

Non-Tacky Fluorinated and Elastomeric STEM Networks.

Macromol Rapid Commun 2019 Feb 10:e1800876. Epub 2019 Feb 10.

Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA.

Soft, elastomeric, non-tacky polymer networks are synthesized by reversible deactivation radical polymerization (RDRP). First, the pristine, structurally tailored and engineered macromolecular (STEM) networks are synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization and incorporated an atom transfer radical polymerization (ATRP) inimer into the network. Subsequently, poly(n-butyl acrylate) (PBA) and/or poly(octafluoropentyl acrylate) (POFPA) side chains are grafted from the network by photo-induced ATRP. Read More

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http://dx.doi.org/10.1002/marc.201800876DOI Listing
February 2019
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Polyurethane Coatings Based on Renewable White Dextrins and Isocyanate Trimers.

Macromol Rapid Commun 2019 Feb 7:e1800874. Epub 2019 Feb 7.

Macromolecular Chemistry and New Polymeric Materials, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.

The polyurethane industry is strongly dependent on fossil-based polyols and polyisocyanates. Developing novel sustainable polyols from valuable biobased building blocks is a first step toward strong and durable development. The synthesis and properties of PU films based on pristine and acylated white dextrins (AVEDEX W80) as polyol and an aliphatic, low-viscosity, solvent-free triisocyanate based on hexamethylene diisocyanate (trimer-Desmodur N3300) as crosslinker is reported. Read More

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http://dx.doi.org/10.1002/marc.201800874DOI Listing
February 2019

Thermoresponsive DNA by Intercalation of dsDNA with Oligoethylene-Glycol-Functionalized Small-Molecule Intercalators.

Macromol Rapid Commun 2019 Feb 6:e1800900. Epub 2019 Feb 6.

Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000, Ghent, Belgium.

Thermoresponsive polymeric materials are important building blocks for smart materials. In this work, the transformation of dsDNA into a thermoresponsive polymer is reported by intercalation of short, oligoethylene-glycol-modified proflavine intercalators. The thermoresponsiveness of the dsDNA-intercalator complex originates from the heating-induced dehydration of the ethylene glycol side chains, which leads to aggregation of the intercalated dsDNA. Read More

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http://dx.doi.org/10.1002/marc.201800900DOI Listing
February 2019
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Waterproof and Breathable Electrospun Nanofibrous Membranes.

Macromol Rapid Commun 2019 Feb 6:e1800931. Epub 2019 Feb 6.

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai, 201620, China.

Waterproof and breathable (W&B) membranes combine fascinating properties of resistance to liquid water penetration and transmitting of water vapor, playing a key role in addressing problems related to health, resources, and energy. Electrospinning is an efficient and advanced way to construct nanofibrous materials with easily tailored wettability and adjustable pore structure, therefore providing an ideal strategy for constructing W&B membranes. In this review, recent progress on electrospun W&B membranes is summarized, involving materials design and fabrication, basic properties of electrospun W&B membranes associated with waterproofness and breathability, as well as their applications. Read More

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http://dx.doi.org/10.1002/marc.201800931DOI Listing
February 2019
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Glycerol Induced Catalyst-Free Curing of Epoxy and Vitrimer Preparation.

Macromol Rapid Commun 2019 Feb 5:e1800889. Epub 2019 Feb 5.

School of Mechanical and Materials Engineering, Composite Materials and Engineering Center, Washington State University, Pullman, WA, 99164, USA.

Epoxy vitrimers prepared from anhydride-cured epoxies exhibit, repairable and reprocessable properties; however, they generally rely on a large amount of catalyst for accelerating the dynamic transesterification (DTER). If the catalyst loading is not enough, the vitrimer properties will be limited. In this work, a preparation method of catalyst-free epoxy vitrimer is demonstrated by adding glycerol to an epoxy-anhydride curing system. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/marc.2018008
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http://dx.doi.org/10.1002/marc.201800889DOI Listing
February 2019
2 Reads

Synthesis of Polypeptoid-Polycaprolactone-Polytetrahydrofuran Heterograft Molecular Polymer Brushes via a Combination of Janus Polymerization and ROMP.

Macromol Rapid Commun 2019 Feb 5:e1800905. Epub 2019 Feb 5.

MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China.

Janus polymerization is a novel and efficient way to synthesize diblock and multiblock copolymers in one step by using Lu(OTf) and propylene epoxide as a catalytic system. By modifying the epoxide initiator, which is located at the block junction with various functional groups, the possibility for future topological design is provided. Herein, 2-bicyclo[2. Read More

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http://dx.doi.org/10.1002/marc.201800905DOI Listing
February 2019

Unraveling the Correlation between Structures of Carbon Nanospheres Derived from Polymeric Spheres and Their Electrochemical Performance to Achieve High-Rate Supercapacitors.

Macromol Rapid Commun 2019 Jan 30:e1800770. Epub 2019 Jan 30.

College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China.

Understanding correlation between the nanostructure of porous carbons and their ion transport behavior is critical for achieving high-performance supercapacitors. Herein, the relationship between size and shell thickness of carbon nanospheres (CNSs) and capacitive electrochemical performance is clarified. Structural uniform CNSs with controlled diameters, prepared via template-free interfacial copolymerization, are emerging as an ideal platform for investigating the ion transport behavior. Read More

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http://dx.doi.org/10.1002/marc.201800770DOI Listing
January 2019
4.941 Impact Factor

Crosslinkable-Chitosan-Enabled Moisture-Resistant Multilayer Gas Barrier Thin Film.

Macromol Rapid Commun 2019 Jan 30:e1800853. Epub 2019 Jan 30.

Department of Chemistry, Materials Science and Engineering, and Mechanical Engineering, Texas A&M University, College Station, TX, 77843, USA.

Chitosan-based films exhibit good oxygen barrier that degrades when exposed to high humidity. In an effort to overcome this drawback, a multilayer nanocoating consisting of crosslinkable chitosan (CHQ) and poly(acrylic acid) [PAA] is deposited on polyethylene terephthalate (PET) using layer-by-layer assembly. Chitosan is functionalized with glycidyl methacrylate to introduce acrylic functionalities within the film. Read More

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http://doi.wiley.com/10.1002/marc.201800853
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http://dx.doi.org/10.1002/marc.201800853DOI Listing
January 2019
4 Reads

Highly Thermally Conductive Polyimide Composites via Constructing 3D Networks.

Macromol Rapid Commun 2019 Jan 23:e1800805. Epub 2019 Jan 23.

Department of Applied Chemistry, School of Science, MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Northwestern Polytechnical University, Xi'an, 710072, China.

Easy and high efficient methods are in great demand to obtain polyimide (PI) composites with high thermal conductivity in the electronic packaging field. In this work, PI/boron nitride (BN) composites with high thermal conductivity are easily fabricated. Tightly connected and well-arranged BN platelets construct effective 3D thermally conductive networks in the PI matrix upon hot pressing, after BN platelets are coated on the surface of PI granules by the help of a kind of PI adhesive. Read More

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http://dx.doi.org/10.1002/marc.201800805DOI Listing
January 2019
1 Read

Supramolecular Gel Based on Crown-Ether-Appended Dynamic Covalent Macrocycles.

Macromol Rapid Commun 2019 Jan 23:e1800731. Epub 2019 Jan 23.

Sino-German Joint Research Lab for Space Biomaterials and Translational Technology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China.

A new type of dynamic covalent macrocycle with self-promoted supramolecular gelation behavior is developed. Under oxidative conditions, the dithiol compound containing a diamide alkyl linker with an odd number (7) of carbon chain and an appended crown ether shows a remarkable gelation ability in acetonitrile, without any template molecules. Due to the existence of crown ethers and disulfide bonds, the obtained gel shows a multiple stimuli-responsiveness behavior. Read More

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http://dx.doi.org/10.1002/marc.201800731DOI Listing
January 2019
4 Reads

A Robust Salty Water Adhesive by Counterion Exchange Induced Coacervate.

Macromol Rapid Commun 2019 Jan 23:e1800758. Epub 2019 Jan 23.

Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.

Counterion exchange of charged macromolecules has comprehensive implications in biological and synthetic systems such as protein function, biosignaling, ion conducting, and separation, but the correlation between the dynamic ion exchange, polyelectrolyte phase separation, and functionality remains elusive. Here, counterion exchange is exploited as a means to facilitate liquid-liquid phase separation and coacervates featuring higher stability and versatility compared with conventional complex coacervate. Self-coacervation of a cationic polyelectrolyte (polyamidoamine-epichlorohydrin, PAE-Cl) occurs in broader conditions when its original counter anion (Cl ) is exchanged by bis(trifluoromethane-sulphonyl)imide anion (TFSI ), as a result of TFSI counter anions association instead of polyelectrolyte complexation. Read More

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http://dx.doi.org/10.1002/marc.201800758DOI Listing
January 2019
1 Read

Self-Healing Polymeric Hydrogel Formed by Metal-Ligand Coordination Assembly: Design, Fabrication, and Biomedical Applications.

Macromol Rapid Commun 2019 Jan 23:e1800837. Epub 2019 Jan 23.

Division of Polymer Chemistry, Department of Chemistry-Ångström, Uppsala University, Uppsala, 75121, Sweden.

Self-healing hydrogels based on metal-ligand coordination chemistry provide new and exciting properties that improve injectability, rheological behaviors, and even biological functionalities. The inherent reversibility of coordination bonds improves on the covalent cross-linking employed previously, allowing for the preparation of completely self-healing hydrogels. In this article, recent advances in the development of this class of hydrogels are summarized and their applications in biology and medicine are discussed. Read More

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http://doi.wiley.com/10.1002/marc.201800837
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http://dx.doi.org/10.1002/marc.201800837DOI Listing
January 2019
2 Reads

Grafting from Starch Nanoparticles with Synthetic Polymers via Nitroxide-Mediated Polymerization.

Macromol Rapid Commun 2019 Jan 21:e1800834. Epub 2019 Jan 21.

Department of Chemical Engineering, Queen's University, 19 Division St, Kingston, Ontario, K7L 3N6, Canada.

Nitroxide-mediated polymerization (NMP) is employed to graft synthetic polymers from polysaccharides. This work demonstrates the first successful polymer grafting from starch nanoparticles (SNPs) via NMP. To graft synthetic polymers from the SNPs' surface, the SNPs are first functionalized with 4-vinylbenzyl chloride prior to reaction with BlocBuilder MA yielding a macroinitiator. Read More

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http://dx.doi.org/10.1002/marc.201800834DOI Listing
January 2019

Polymerization-Induced Self-Assembly.

Macromol Rapid Commun 2019 01;40(2):e1800885

Institut Parisien de Chimie Moléculaire (IPCM), Polymer Chemistry Team, Sorbonne Université, CNRS, UMR 82324, Place Jussieu, 75005, Paris, France.

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http://dx.doi.org/10.1002/marc.201800885DOI Listing
January 2019

A Highly Ionic Conductive, Healable, and Adhesive Polysiloxane-Supported Ionogel.

Macromol Rapid Commun 2019 Jan 17:e1800776. Epub 2019 Jan 17.

Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China.

A new kind of polysiloxane-supported ionogel is successfully designed via locking ionic liquids (ILs), 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][Tf N]), into poly(aminopropyl-methylsiloxane) (PAPMS) grafted with [2-(methacryloyloxy)ethyl] trimethylammonium chloride (METAC) in the presence of tannic acid (TA). The novel ionogel exhibits good mechanical and recovery properties, as well as high ionic conductivity (1.19 mS cm ) at 25 °C. Read More

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http://dx.doi.org/10.1002/marc.201800776DOI Listing
January 2019
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Different Routes to Ampholytic Polydehydroalanine: Orthogonal versus Simultaneous Deprotection.

Macromol Rapid Commun 2019 Jan 17:e1800857. Epub 2019 Jan 17.

Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich-Schiller-University Jena, Humboldtstraße 10, D-07743, Jena, Germany.

Polydehydroalanine (PDha) is a polyampholyte featuring both a -NH and a -COOH in every repeat unit and with that presents a rather high charge density. The synthesis and polymerization of two monomers, benzyl 2-tert-butoxycarbonylaminoacrylate and methyl 2-benzyloxycarbonylaminoacrylate is herein reported, which feature different protective groups and, after polymerization, the resulting PtBABA and PBOMA can be transformed into PDha using polymer-analogous modification reactions. More important, the current choice of protective groups allows either simultaneous deprotection in one step in both cases, but also the orthogonal deprotection of either -NH or -COOH moiety for PtBABA, given that appropriate conditions are chosen. Read More

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http://dx.doi.org/10.1002/marc.201800857DOI Listing
January 2019

ATRP of N-Hydroxyethyl Acrylamide in the Presence of Lewis Acids: Control of Tacticity, Molecular Weight, and Architecture.

Macromol Rapid Commun 2019 Jan 16:e1800877. Epub 2019 Jan 16.

Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA.

Good control of tacticity, molecular weight, and architecture is attained via atom transfer radical polymerization (ATRP) of N-hydroxyethyl acrylamide (HEAA), in a one-pot process in the presence of Y(OTf) . The effect of temperature, ratio of [Y(OTf) ]/[HEAA], and ATRP procedure on the tacticity and degree of control over the polymerization is investigated in detail. Under optimal conditions, using photo ATRP and 15% Y(OTf) the content of meso dyads (m) can be increased from 42% to 80% in a homopolymer with a dispersity D = 1. Read More

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http://dx.doi.org/10.1002/marc.201800877DOI Listing
January 2019

Nanoscale Archimedean Tilings Formed by 3-Miktoarm Star Terpolymer Thin Films.

Macromol Rapid Commun 2019 Jan 11:e1800860. Epub 2019 Jan 11.

Laboratoire de Chimie des Polymères Organiques, CNRS - ENSCPB - Université de Bordeaux, 16 Avenue Pey-Berland, F-33607, Pessac Cedex, France.

3-Miktoarm star terpolymer architecture (3µ-ABC), consisting of three dissimilar polymer chains, A, B, and C connected at a junction point, provides a unique opportunity in the design of complex nanoscale patterns such as Archimedean tilings that are not accessible from linear ABC terpolymers. In this work, the synthesis and the self-assembly of 3-miktoarm star terpolymers, namely, polystyrene-arm-poly(2-vinylpyridine)-arm-polyisoprene (3µ-SPI) into Archimedean tiling patterns is described. Several 3µ-SPI terpolymers are produced via a mid-functional PS-b-P2VP, synthesized by sequential anionic polymerization, using a 1,1-diphenylethylene bearing a tert-butyldimethylsilyl-protected hydroxyl functionality as a core molecule. Read More

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http://dx.doi.org/10.1002/marc.201800860DOI Listing
January 2019

TAD Click Chemistry on Aliphatic Polycarbonates: A First Step Toward Tailor-Made Materials.

Macromol Rapid Commun 2019 Jan 11:e1800743. Epub 2019 Jan 11.

Laboratory of Pharmaceutical Analysis, Faculty of Medicine and Pharmacy, University of Mons, 20 Place du Parc, 7000, Mons, Belgium.

For the first time, the effectiveness of triazolinedione (TAD) click chemistry onto aliphatic polycarbonates (APC) is demonstrated. Statistic copolymers carrying click-reactive conjugated diene (in a ratio of 10%) are synthesized via organocatalyzed ring-opening polymerization. The highly efficient click reaction of TADs carrying simple butyl and phenyl functions are confirmed by H-NMR and DSC. Read More

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http://dx.doi.org/10.1002/marc.201800743DOI Listing
January 2019

Happy Birthday, MRC!

Macromol Rapid Commun 2019 01;40(1):e1800861

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http://dx.doi.org/10.1002/marc.201800861DOI Listing
January 2019

Unprecedented Multicolor Photoluminescence from Hyperbranched Poly(amino ester)s.

Macromol Rapid Commun 2019 Jan 2:e1800658. Epub 2019 Jan 2.

MOE Key Laboratory of Space Applied Physics and Chemistry, Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an, 710072, P. R. China.

A novel kind of water-soluble fluorescent hyperbranched poly(amino ester) (PAE) is prepared through a one-pot polycondensation reaction of citric acid (CA) and N-methyldiethanolamine (NMDEA). The PAE exhibits enhanced and red-shift fluorescence with increasing solution concentration, showing distinct aggregation-induced emission character. Interestingly, the resulting PAE exhibits tunable photoluminescence from blue, cyan, and green to red irradiated by altering the excitation wavelengths. Read More

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http://dx.doi.org/10.1002/marc.201800658DOI Listing
January 2019

Simple Synthesis of Elastomeric Photomechanical Switches That Self-Heal.

Macromol Rapid Commun 2019 Feb 2;40(4):e1800815. Epub 2019 Jan 2.

Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14850, USA.

This article introduces a simple two-stage method to synthesize and program a photomechanical elastomer (PME) for light-driven artificial muscle-like actuations in soft robotics. First, photochromic azobenzene molecules are covalently attached to a polyurethane backbone via a two-part step-growth polymerization. Next, mechanical alignment is applied to induce anisotropic deformations in the PME-actuating films. Read More

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http://dx.doi.org/10.1002/marc.201800815DOI Listing
February 2019
2 Reads
4.941 Impact Factor

Biomolecule Sensor Based on Azlactone-Modified Hydrogel Films.

Macromol Rapid Commun 2018 Dec 27:e1800674. Epub 2018 Dec 27.

Department Chemie, Universität Paderborn, Warburgerstraße 100, D-33098, Paderborn, Germany.

A 3D hydrogel layer is probed by combining surface plasmon resonance with optical waveguide spectroscopy to detect biomolecules. A template terpolymer P(DMAAm-co-DMIAAm-co-VDMA) is synthesized via reversible addition-fragmentation chain-transfer polymerization. The terpolymer is then modified with an amino group bearing biotin to enable biomolecular recognition for streptavidin. Read More

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http://dx.doi.org/10.1002/marc.201800674DOI Listing
December 2018
4.941 Impact Factor

Combinatorial Synthesis of Peptoid Arrays via Laser-Based Stacking of Multiple Polymer Nanolayers.

Macromol Rapid Commun 2018 Dec 21:e1800533. Epub 2018 Dec 21.

Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.

Here, the combinatorial synthesis of molecule arrays via a laser-assisted process is reported. Laser-transferred polymer nanolayers with embedded monomers, activators, or bases can be reliably stacked on top of each other, spot-by-spot, to synthesize molecule arrays. These various chemicals in the nanometer-thin layers are mixed by heat or solvent vapor, inducing coupling reactions. Read More

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http://dx.doi.org/10.1002/marc.201800533DOI Listing
December 2018
1 Read

New Fused Pyrrolopyridine-Based Copolymers for Organic Solar Cell.

Macromol Rapid Commun 2018 Dec 21:e1800784. Epub 2018 Dec 21.

Department of Chemistry, Research Institute for Green Energy Convergence Technology, Gyeongsang National University, 900 Gajwa, Jinju, 660-701, Republic of Korea.

A fused pyrrolopyridine core having substituents on the nitrogen atom instead of the carbon atom of the indoloindole unit is developed as a new donor unit for organic electronics. The new donor-acceptor copolymers, PDHPHBT, PDHPFBT, and PDHP2FBT, are synthesized using the new donor unit, well-known benzothiadiazole derivatives containing fluorine atoms as the acceptor. The thermal, optical, and electrochemical properties of these novel copolymers are reported. Read More

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http://dx.doi.org/10.1002/marc.201800784DOI Listing
December 2018

Hybrid Janus Microparticles Achieving Selective Encapsulation for Theranostic Applications via a Facile Solvent Emulsion Method.

Macromol Rapid Commun 2018 Dec 20:e1800801. Epub 2018 Dec 20.

School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798.

Anisotropic Janus particles composed of biocompatible polymers have been gaining considerable interest for biomedical applications. Here, the fabrication of hybrid Janus particles via a single-step solvent emulsion technique, potentially for theranostic purposes, is shown. Through this technique, the selective encapsulation of therapeutic and diagnostic agents is streamlined into different "faces" of the Janus structure. Read More

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http://dx.doi.org/10.1002/marc.201800801DOI Listing
December 2018
1 Read

Synthetic 2D Polymers: A Critical Perspective and a Look into the Future.

Macromol Rapid Commun 2019 Jan 22;40(1):e1800719. Epub 2018 Nov 22.

Institute of Polymers, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093, Zürich, Switzerland.

This feature article provides both a critical perspective as to where synthetic 2D polymers currently stand and a rather substantial view into how the future of this exciting field of polymer chemistry might look. It starts out by addressing strategic considerations meant to familiarize the reader with what to expect when entering the field. To better understand these considerations, the very nature of a 2D polymer is addressed in comparison to other organic 2D materials. Read More

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http://dx.doi.org/10.1002/marc.201800719DOI Listing
January 2019
4.941 Impact Factor

One-Step Preparation of Tough and Self-Healing Polyion Complex Hydrogels with Tunable Swelling Behaviors.

Macromol Rapid Commun 2019 Feb 22;40(4):e1800691. Epub 2018 Nov 22.

CAS Key Laboratory of Soft Matter Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, P. R. China.

Polyion complex (PIC) hydrogels formed by charge attraction of opposite charged polymers have received unique research interest. Their conventional preparation method, with a large amount of residual salt after polymerization, requires a long-term dialysis treatment to remove the salt and toughen the gel. Here, a promising strategy for the one-step preparation of tough PIC hydrogels without dialysis after polymerization is provided. Read More

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http://dx.doi.org/10.1002/marc.201800691DOI Listing
February 2019
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Silver Metallic Cyclodextrin-Core Star mPEG.

Macromol Rapid Commun 2018 Dec 18:e1800562. Epub 2018 Dec 18.

Key Laboratory of Macromolecular Science and Technology of Shaanxi Province, Department of Applied Chemistry, Northwestern Polytechnical University, Xi'an, 710072, P. R. China.

A novel silver metallic β-cyclodextrin (β-CD)-core star methoxypolyethylene glycol (mPEG) (SM-CD-SPEG) is presented. For this, a well-defined water-soluble β-CD-core star mPEG with aldehyde groups (CD-star(ald)PEG, III) is first designed and synthesized via the copper-catalyzed azide-alkyne click reaction. Then, silver nanoparticles are formed within III through the oxidation-reduction reaction between the aldehyde groups and silver ions. Read More

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http://dx.doi.org/10.1002/marc.201800562DOI Listing
December 2018
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Boric Acid as a Coupling Agent for Preparation of Phenolic Resin Containing Boron and Silicon with Enhanced Char Yield.

Macromol Rapid Commun 2018 Dec 17:e1800702. Epub 2018 Dec 17.

Department of Applied Chemistry, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an 710072, China.

In this study, an innovative, facile, and low-cost method is developed to prepare phenolic resin (PR) containing boron and silicon (BSiPR). BSiPR is synthesized by a solvent-free, one-pot method using boric acid as the coupling agent instead of silane, and methyltriethoxysilane as the silicon source. The results show that boron and silicon elements are introduced into PR via BOC and BOSi structures. Read More

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http://dx.doi.org/10.1002/marc.201800702DOI Listing
December 2018
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Hydrophilicity-Controlled Conjugated Microporous Polymers for Enhanced Visible-Light-Driven Photocatalytic H Evolution.

Macromol Rapid Commun 2018 Dec 17:e1800494. Epub 2018 Dec 17.

College of Science, Huazhong Agricultural University, Wuhan, 430070, P. R. China.

To take advantage of high surface area of network conjugated microporous polymers, four linear or network conjugated polymers L-PDBT, L-PDBT-O, N-PDBT, and N-PDBT-O are designed in terms of water-compatibility, and it turned out that microporous network N-PDBT-O exhibited the highest hydrogen evolution rate (HER) at 366 µmol h under visible light irradiation (λ > 420 nm, one of best reported pristine polymer-based photocatalysts), which is three times higher than the corresponding linear L-PDBT-O. Water contact angle measurements revealed that benzothiophene-sulfone-based conjugated polymers display better water compatibility and adsorption, and the synergic effect of better hydrophilic surface and higher surface area of N-PDBT-O might eventually lead to more exposed active sites in comparison to linear L-PDBT-O in the H evolution suspension system. The hydrophilicity-controlled strategy could be applied to design of other network conjugated microporous polymer photocatalysts in an attempt to improve the activity. Read More

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http://dx.doi.org/10.1002/marc.201800494DOI Listing
December 2018
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A Mechanically Robust, Stiff, and Tough Hyperbranched Supramolecular Polymer Hydrogel.

Macromol Rapid Commun 2018 Dec 14:e1800819. Epub 2018 Dec 14.

School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China.

In this study, a simple yet versatile method is introduced to prepare a hyperbranched supramolecular polymer hydrogel by utilizing Type II photoinitiated self-condensing vinyl polymerization of N-acryloyl glycinamide, which can serve not only as an inimer providing branching sites, but also as a hydrogen-bonding cross-linker. The hyperbranched poly(N-acryloyl glycinamide) (HB-PNAGA) hydrogels demonstrate excellent mechanical performances with a tensile strength of 0.793-2. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/marc.2018008
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http://dx.doi.org/10.1002/marc.201800819DOI Listing
December 2018
11 Reads

Synthesis of Negative-Charged Metal-Containing Cyclomatrix Polyphosphazene Microspheres Based on Polyoxometalates and Application in Charge-Selective Dye Adsorption.

Macromol Rapid Commun 2018 Dec 7:e1800730. Epub 2018 Dec 7.

Department of Applied Chemistry, School of Science MOE Key Lab for Materials Physics and Chemistry Extraordinary Condition, Northwestern Polytechnical University, Xi'an 710129, Shaanxi, China.

A negative-charged, metal-containing cyclomatrix polyphosphazene microsphere (MCPM) is synthesized using the strategy of precipitation polymerization of di-functionalized polyoxometalates (POMs) and hexachlorocyclotriphosphazene. The chemical structure of these MCPMs is well characterized by C MAS NMR and P MAS NMR, as well as FT-IR, electron microscopy, and X-ray photoelectron spectroscopy. The covalent grafting of the rigid POMs clusters into the framework of these microspheres prevents the collapsing of the pores, making these MCPMs porous materials. Read More

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http://dx.doi.org/10.1002/marc.201800730DOI Listing
December 2018
2 Reads

Dielectric and Resistive Heating of Polymeric Media: Toward Remote Thermal Activation of Stimuli-Responsive Soft Materials.

Macromol Rapid Commun 2019 Feb 11;40(4):e1800669. Epub 2018 Dec 11.

Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695, USA.

Stimuli-responsive soft materials are becoming increasingly important in a wide range of contemporary technologies, and methods by which to promote thermal stimulation remotely are of considerable interest for controllable device deployment, particularly in inaccessible environments such as outer space. Until now, remote thermal stimulation of responsive polymers has relied extensively on the use of nanocomposites wherein embedded nanoparticles/structures are selectively targeted for heating purposes. In this study, an alternative remote-heating mechanism demonstrates that the dielectric and resistive thermal losses introduced upon application of an alternating current generate sufficient heat to raise the temperature of a neat polyimide by over 70 °C within ≈10 s. Read More

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http://dx.doi.org/10.1002/marc.201800669DOI Listing
February 2019

A Reversible Proton Generator with On/Off Thermoswitch.

Macromol Rapid Commun 2018 Dec 7:e1800713. Epub 2018 Dec 7.

Max Planck Institute for Polymer Research, Ackermannweg, 10, Germany.

A reversible polymer photoacid with a thermal on/off switch at physiological temperature able to trigger a large pH modulation of its environment is prepared. Light is used to control the acidity of the solution. Additionally, the temperature could be used to modulate the photoacid efficiency, practically turning on and off the ability of the polymer to produce protons. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/marc.2018007
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http://dx.doi.org/10.1002/marc.201800713DOI Listing
December 2018
5 Reads

Monitoring Metallo-Macromolecular Assembly Equilibria by Ion Mobility-Mass Spectrometry.

Macromol Rapid Commun 2018 Nov 30:e1800667. Epub 2018 Nov 30.

Departments of Chemistry and Polymer Science, The University of Akron, Akron, OH, 44325, USA.

Ion mobility-mass spectrometry (IM-MS) allows the separation of isomeric and isobaric species on the basis of their size, shape, and charge. The fast separation timescale (ms) and high sensitivity of these measurements make IM-MS an ideally suitable method for monitoring changes in macromolecular structure, such as those occurring in interconverting terpyridine-based metallosupramolecular self-assemblies. IM-MS is used to verify the elemental composition (size) and architecture (shape) of the self-assembled products. Read More

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http://dx.doi.org/10.1002/marc.201800667DOI Listing
November 2018

Modular Approach for the Design of Smart Polymeric Nanocapsules.

Macromol Rapid Commun 2019 Jan 3;40(1):e1800577. Epub 2018 Dec 3.

Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.

The formation of nanocapsules from a modular perspective for self-assembled nanocapsules, so-called polymersomes, and nanocapsules with a covalently formed shell are discussed in this review. It is shown that there are common and comparable ways for the selective and controlled release of payloads for stimuli-responsive systems and nanocapsule functionalization in order to use them for drug delivery and diagnostic applications. Read More

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http://dx.doi.org/10.1002/marc.201800577DOI Listing
January 2019

Novel Functional TPE Polymers: Aggregation-Induced Emission, pH Response, and Solvatochromic Behavior.

Macromol Rapid Commun 2018 Dec 3:e1800774. Epub 2018 Dec 3.

Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.

Four tetraphenylethylene (TPE)-based aryleneethynylene polymers with amino or nitro groups are reported. They display strong aggregation-induced emission (AIE). The functional groups trigger acidochromic changes in the emission behavior of these polymers. Read More

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http://doi.wiley.com/10.1002/marc.201800774
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http://dx.doi.org/10.1002/marc.201800774DOI Listing
December 2018
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Molecular "Building Block" and "Side Chain Engineering": Approach to Synthesis of Multifunctional and Soluble Poly(pyrrole phenylene)s.

Macromol Rapid Commun 2018 Dec 4:e1800749. Epub 2018 Dec 4.

Polymer Electronics Research Centre, School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland, 1010, New Zealand.

Here, the synthesis of a novel poly(pyrrole phenylene) (PpyP) that is both modular in ways of functionalization and soluble in organic solvents is reported, and therefore solution processable. This is achieved through the functionalization of the side-chain substituents in pyrrole phenylene (PyP) repeating units. Butyl acrylate brushes are first grafted through atom transfer radical polymerization from one type of PyP, followed by oxidative chemical co-polymerization of the grafted PyP with a PyP bearing different side chains-either an azide or a methoxy moiety, resulting in a soluble PpyP where solubility is not dopant-dependent. Read More

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http://doi.wiley.com/10.1002/marc.201800749
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http://dx.doi.org/10.1002/marc.201800749DOI Listing
December 2018
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Extremely Compressible Hydrogel via Incorporation of Modified Graphitic Carbon Nitride.

Macromol Rapid Commun 2019 Feb 30;40(4):e1800712. Epub 2018 Nov 30.

Max-Planck-Institute of Colloids and Interfaces, Department of Colloid Chemistry, Am Mühlenberg 1, 14476, Potsdam, Germany.

Extremely compressible hydrogels are fabricated in one pot via sulfonic-acid-modified graphitic carbon nitride (g-CN-AHPA) as a visible light photoinitiator and reinforcer. The hydrogels show unusual compressibility upon applied stress up to 12 MPa, presenting temporary physical deformation, and remain undamaged after stress removal despite their high water content (90 wt%). Cyclic compressibility proves the fatigue resistance of the covalently and electrostatically reinforced system that possesses tissue adhesive properties, shock resistance, cut resistance, and little to no toxicity. Read More

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http://dx.doi.org/10.1002/marc.201800712DOI Listing
February 2019
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Bacteria-Targeted Supramolecular Photosensitizer Delivery Vehicles for Photodynamic Ablation Against Biofilms.

Macromol Rapid Commun 2019 Feb 30;40(4):e1800763. Epub 2018 Nov 30.

MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China.

Photodynamic therapy (PDT) is believed to be a potent method for biofilm treatments. However, undesired damage to normal cells may be caused due to the nonselective nature of PDT. Therefore, targeted PDT is preferred on one hand to enhance antimicrobial effects and on the other hand to reduce cytotoxicity to normal cells. Read More

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http://dx.doi.org/10.1002/marc.201800763DOI Listing
February 2019
1 Read