Polymer Science News

Application of an addition-fragmentation-chain transfer monomer in di(meth)acrylate network formation to reduce polymerization shrinkage stress

RSC - Polym. Chem. latest articles - Wed, 06/21/2017 - 07:18

Polym. Chem., 2017, Advance Article
DOI: 10.1039/C7PY00702G, PaperParag K. Shah, Jeffrey W. Stansbury, Christopher N. Bowman
Reduction in photopolymerization-induced shrinkage stress is achieved using an addition-fragmentation chain transfer moiety incorporated into a dimethacrylate monomer that participates in network formation with multifunctional (meth)acrylates.
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Aqueous Solution Behaviour of Novel Water-Soluble Amphiphilic Copolymers with Elevated Hydrophobic Unit Content

RSC - Polym. Chem. latest articles - Wed, 06/21/2017 - 06:18
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00832E, PaperZhen Jiang, Idriss Blakey, Andrew Whittaker
A series of water-soluble statistical copolymers poly(OEGMA-stat-styrene) and block copolymers poly(OEGMA-stat-styrene)-b-PDMAPMA have been synthesized via RAFT polymerization. Despite the polymers having a relatively high styrene content they are readily soluble...
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Study of the RAFT homopolymerization and copolymerization of N-[3-(dimethylamino)propyl]methacrylamide hydrochloride and evaluation of the cytotoxicity of the resulting homo- and copolymers

RSC - Polym. Chem. latest articles - Wed, 06/21/2017 - 06:18
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00837F, PaperRavin Narain, Pratyawadee Singhsa, Hathaikarn Manuspiya
The reversible addition-fragmentation chain transfer (RAFT) polymerization of N-[3-(dimethylamino)propyl]methacrylamide hydrochloride (DMAPMA.HCl) was studied. A detailed investigation of the effect of the polymerization conditions was carried out. The polymerization was conducted...
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Triazolinedione-"clicked" poly(phosphoester)s: Systematic adjustment of thermal properties

RSC - Polym. Chem. latest articles - Wed, 06/21/2017 - 06:18
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00813A, CommunicationGreta Becker, Laetitia Vlaminck, Maria Martinez-Velencoso, Filip Du Prez, Frederik R Wurm
The thermal properties of halogen-free flame retardant poly(phosphoester)s from acyclic diene metathesis polycondensation have been optimized by a systematic post-modification using 1,2,4-triazoline-3,5-dione derivatives. The straightforward modification not only increased their...
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Thermoresponsive Laterally-Branched Polythiophene Phenylene Derivative as Water-Soluble Temperature Sensor

RSC - Polym. Chem. latest articles - Wed, 06/21/2017 - 05:18
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00919D, PaperEddie Wai Chi Chan, Paul Baek, Victor R De la Rosa, David Barker, Richard Hoogenboom, Jadranka Travas-Sejdic
Polymers with thermoresponsive properties have received a strong interest due to their potential applications. Here we report the synthesis and characterisation of a water soluble and thermoresponsive polythiophene derivative. Firstly,...
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Fabrication of multi-stimuli responsive supramolecular hydrogels based on host-guest inclusion complexation of a tadpole-shaped cyclodextrin derivative with the azobenzene dimer

RSC - Polym. Chem. latest articles - Tue, 06/20/2017 - 12:10

Polym. Chem., 2017, Advance Article
DOI: 10.1039/C7PY00698E, PaperXing Wang, Juan Wang, Yanyu Yang, Fei Yang, Decheng Wu
Multi-responsive supramolecular hydrogels, based on host-guest complexation of tadpole-shaped cyclodextrin with the azobenzene dimer, possess reversible sol-gel transition behaviors and better biocompatibility.
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Facile synthesis and properties of novel cardo poly(arylene ether sulfone)s with pendent cycloaminium side chains as anion exchange membranes

RSC - Polym. Chem. latest articles - Tue, 06/20/2017 - 02:05
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00690J, PaperFeixiang Gong, Ruiqiang Wang, Xinbing Chen, Pei Chen, Zhongwei An, Suobo Zhang
To produce a high anion-conductive and durable polymer electrolyte membrane for alkaline fuel cell applications, series of novel cardo poly(arylene ether sulfone)s with different cycloaminium side chains were prepared, and...
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Four-fold increase in epoxide polymerization rate with change of alkyl-substitution on mono-[small micro]-oxo-dialuminum initiators

RSC - Polym. Chem. latest articles - Tue, 06/20/2017 - 02:05
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00894E, PaperRobert Ferrier, Jennifer Imbrogno, Christina Rodriguez, Malgorzata Chwatko, Paul William Meyer, Nathaniel A. Lynd
We present an improvement in the rate, utility, and mechanistic understanding of mono-[small micro]-oxo-dialuminum initiators for epoxide ring-opening polymerization based on investigation of a homologous series of trialkylaluminum adducts of (2-dibenzylamino)ethoxy-diethylaluminum...
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Synthesis of conjugated copolymers by combining different coupling reactions

RSC - Polym. Chem. latest articles - Mon, 06/19/2017 - 07:56
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00624A, PaperTine Hardeman, Guy Koeckelberghs
Despite the significant progress in the controlled synthesis of conjugated polymers using a Catalyst Transfer Condensative Polymerization, the possibilities regarding random and gradient copolymers remain very limited. Therefore, a novel...
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CO2-Responsive Fluorescent Hyperbranched Poly(ether amine)

RSC - Polym. Chem. latest articles - Mon, 06/19/2017 - 05:55
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00626H, PaperBing Yu, Yue Zhao
A series of anthracene-capped, hyperbranched poly(ether amine)s (hPEA-AN) with varying hydrophilicity were designed and synthesized. Their fluorescence emission intensity in aqueous solution increases after carbon dioxide (CO2) bubbling as a...
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Cell-penetrating poly(disulfide)s-based star polymer for simultaneous intracellular delivery of miRNAs and small molecule drugs

RSC - Polym. Chem. latest articles - Mon, 06/19/2017 - 05:55
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00666G, PaperWenhua Yang, Changmin Yu, Chunxian Wu, Shao Yao, Shuizhu Wu
MicroRNAs (miRNAs) are small regulatory noncoding RNAs that control a variety of biological processes. The regulation of many endogenous miRNAs is tightly associated with various diseases. Thus, the design of...
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Categories: Polymer Science News

PAA-g-PLA Amphiphilic Graft Copolymer: Synthesis, Self-Assembly, and Drug Loading Ability

RSC - Polym. Chem. latest articles - Mon, 06/19/2017 - 05:55
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00762K, PaperWenhao Qian, Tao Song, Mao Ye, Peicheng Xu, Guolin Lu, Xiaoyu Huang
A well-defined amphiphilic graft copolymer comprising hydrophilic poly(acrylic acid) (PAA) backbone and hydrophobic poly(lactic acid) side chains was synthesized by the combination of reversible addition-fragmentation chain transfer (RAFT) polymerization, ring...
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Grafting CO2-responsive polymers from cellulose nanocrystals via nitroxide-mediated polymerisation

RSC - Polym. Chem. latest articles - Mon, 06/19/2017 - 05:55
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00631D, PaperOmar Garcia-Valdez, Tiziana Brescacin, Joaquin Arredondo, Jean Bouchard, Philip Jessop, Pascale Champagne, Michael F. Cunningham
Cellulose nanocrystals (CNC) are a renewable resource possessing extraordinary physical, mechanical, and optical properties. CNC are readily dispersible only in hydrophilic environments, such as aqueous media and very polar solvents....
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Cross-Linkable Multi-Stimuli Responsive Hydrogel Inks for Direct-Write 3D Printing

RSC - Polym. Chem. latest articles - Mon, 06/19/2017 - 05:55
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00831G, PaperDylan Karis, Robert Ono, Musan Zhang, Ankit Vora, Duane Storti, Mark Ganter, Alshakim Nelson
Triple stimuli-responsive ABA triblock copolymer hydrogels composed of poly(allyl glycidyl ether)-stat-poly(alkyl glycidyl ether)-block-poly(ethylene glycol)-block-poly(allyl glycidyl ether)-stat-poly(alkyl glycidyl ether) were synthesized using controlled ring-opening polymerization of glycidyl ethers. These polymers form...
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Polymerization of Alkyl Diazoacetates Initiated with Amidinate/Pd System: Efficient Synthesis of High Molecular Weight Poly(alkoxycarbonylmethylene)s with Moderate Stereoregularity

RSC - Polym. Chem. latest articles - Mon, 06/19/2017 - 04:53
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00816C, PaperHiroaki Shimomoto, Junya Kawamata, Hirokazu Murakami, Kazuki Yamashita, Tomomichi Itoh, Eiji Ihara
Initiating ability of a new system, amidinate/Pd, for polymerization of diazoacetates is described. The system is effective in affording relatively high number-average molecular weight (Mn) polymers from ethyl diazoacetate (EDA,...
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Photo-reversible bonding and cleavage of amphiphilic block copolymers

RSC - Polym. Chem. latest articles - Fri, 06/16/2017 - 10:20
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00843K, PaperSiham Telitel, Eva Blasco, Lukas Bangert, Felix Helmut Schacher, Anja S. Goldmann, Christopher Barner-Kowollik
We introduce the photo-dimerization and - critically - reversible cleavage of amphiphilic block copolymers via reversible [4+4] anthracene cycloadditions at selected wavelengths ([small lambda]1= 350 nm, [small lambda]2 = 270 nm). The...
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Categories: Polymer Science News

Correction: Selenium borohydride reaction as a versatile platform for the straightforward preparation of selenide-containing topological polymers

RSC - Polym. Chem. latest articles - Thu, 06/15/2017 - 09:06
Polym. Chem., 2017, Advance Article
DOI: 10.1039/C7PY90093G, Correction Open Access &nbsp This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.Chunlai Ding, Caiwei Fan, Xiangqiang Pan, Zhengbiao Zhang, Jian Zhu, Xiulin Zhu
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Design of well-defined shape memory networks with high homogeneity: towards advanced shape memory polymeric materials

RSC - Polym. Chem. latest articles - Thu, 06/15/2017 - 06:05
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00904F, CommunicationXingjian Li, Yi Pan, Jingjuan Lai, Ruiqing Wu, Zhaohui Zheng, Xiaobin Ding
Designing precisely defined network architecture that could integrate desired material properties into one single network is a great challenge for the development of advanced polymeric materials. For thermally induced shape...
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Categories: Polymer Science News

Nitroxide-mediated polymerization-induced self-assembly of amphiphilic block copolymers with a pH/temperature dual sensitive stabilizer block

RSC - Polym. Chem. latest articles - Wed, 06/14/2017 - 09:58
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00595D, PaperXiaoguang Qiao, Pierre-Yves Dugas, Bernadette Charleux, Muriel Lansalot, Elodie Bourgeat-Lami
Comb-like terpolymers with a polymethacrylate backbone, carrying short pendant poly(ethylene)oxide (PEO) side chains (Mn = 300 g mol-1, 5 EO units), carboxylic acid groups and a few styrene (S) units...
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Construction of Flexible and Stable Near-Infrared Absorbing Polymer Films Containing Nickel-Bis(dithiolene) Moieties via Ligand-Exchange Post-Polymerization Modification

RSC - Polym. Chem. latest articles - Wed, 06/14/2017 - 08:57
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00802C, PaperJianhua Han, Zhihuan Weng, Zuoqiang Wu, Jingwen Cai, Jinyan Wang, Xigao Jian
Flexible and stable near-infrared (NIR) absorbing polymer films were prepared from the corresponding poly(aryl ether) precursors through subsequent ligand-exchange post-polymerization modification. The additional ligand triggers the ligand-exchange reaction during the...
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