Polymer Science News

Catalyst-Dependent Intrinsic Ring-Walking Behavior on [small pi]-Face of Conjugated Polymers

RSC - Polym. Chem. latest articles - Thu, 02/09/2017 - 03:52
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C6PY01934J, PaperKoichiro Mikami, Masataka Nojima, Yui Masumoto, Yoshihide Mizukoshi, Ryo Takita, Tsutomu Yokozawa, Uchiyama Masanobu
We show that ring-walking behavior on the [small pi]-face of conjugated polymers is catalyst-dependent, and this significantly affects the composition of the products in catalyst-transfer condensation polymerization (CTCP). Systematic mechanistic study...
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Categories: Polymer Science News

High solids content nitroxide mediated miniemulsion polymerization of n-butyl methacrylate

RSC - Polym. Chem. latest articles - Thu, 02/09/2017 - 03:52
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00067G, PaperNicholas Ballard, Miren Aguirre, Alexandre Simula, Jose Ramon Leiza, Steven van Es, Jose M. Asua
The synthesis of poly(n-butyl methacrylate) by nitroxide mediated miniemulsion polymerization is described using the alkoxyamine 3-(((2-cyanopropan-2-yl)oxy)(cyclohexyl)amino)-2,2-dimethyl-3-phenylpropanenitrile. Polymerizations are successfully conducted to high conversions with high solids content (up to 52...
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Categories: Polymer Science News

Synthesis of Fluorinated Gradient Copolymers via In-Situ Transesterification with Fluoroalcohols in Tandem Living Radical Polymerization

RSC - Polym. Chem. latest articles - Thu, 02/09/2017 - 02:52
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00073A, PaperYusuke Ogura, Takaya Terashima, Mistuo Sawamato
Fluorinated gradient copolymers were synthesized by the tandem catalysis of ruthenium-catalyzed living radical polymerization (LRP) and titanium alkoxide-mediated transesterification of methyl methacrylate (MMA) with fluoroalcohols. Although transesterification using less nucleophilic...
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Categories: Polymer Science News

Model studies of the sequential and simultaneous statistical modification of dendritic functional groups and their implications within complex polymer architecture synthesis.

RSC - Polym. Chem. latest articles - Wed, 02/08/2017 - 11:47
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00140A, PaperFaye Yvette Hern, Sam Auty, Oliver Andren, Michael Malkoch, Steve Rannard
Post-synthesis modification of polymers is a synthetically appealing approach to generate a range of samples from a single, well-characterised starting material. When partial or mixed-functionalisation is sought, an inevitable statistical...
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Categories: Polymer Science News

Bulk Self-Assembly and Ionic Conductivity of a Block Copolymer Containing Azobenzene-Based Liquid Crystalline Polymer and Poly(Ionic Liquid)

RSC - Polym. Chem. latest articles - Wed, 02/08/2017 - 09:45
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C6PY02187E, PaperYudong Zhang, Jing Ping, Qiwei Wu, Hong-Bing Pan, Xing He Fan, Zhihao Shen, Zhou Qi-Feng
By combining nitroxide-mediated block copolymerization with post functionalization and ion exchange, a series of block copolymers (BCPs) containing an azobenzene-based side-chain liquid crystalline (LC) polymer and imidazolium-containing poly(ionic liquid) were...
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Categories: Polymer Science News

Non-conventional fluorescent biogenic and synthetic polymers without aromatic rings

RSC - Polym. Chem. latest articles - Wed, 02/08/2017 - 03:43
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00154A, PaperRuquan Ye, Yuanyue Liu, Haoke Zhang, Huifang Su, Yilin Zhang, Liguo Xu, Rongrong Hu, Ryan T. K. Kwok, Kam Sing Wong, Jacky Wing Yip Lam, William A Goddard, Ben Zhong Tang
Non-conventional fluorescent materials without aromatic structures have attracted much research attention in recent years. However, the working mechanism responsible for their fluorescence remains mysterious. Here we decipher the origin of...
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Categories: Polymer Science News

Investigation on the controlled synthesis and post-modification of poly-[(N-2-hydroxyethyl)-aspartamide]-based polymers

RSC - Polym. Chem. latest articles - Tue, 02/07/2017 - 04:31
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C6PY02230H, CommunicationShixian Lv, Yuchen Wu, Jingqi Dang, Zhaohui Tang, Ziyuan Song, Sheng Ma, Xiao Wang, Xuesi Chen, Jianjun Cheng, Lichen Yin
The production of poly-[(N-2-hydroxyethyl)-aspartamide] (PHEA)-based materials is hurdled by the unsatisfactory synthesis and low reactivity in terms of post-modification. Herein, we reported the controlled synthesis of PHEA-based polymers, unraveled the...
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Nucleobase-Functionalized Supramolecular Polymer Films with Tailorable Properties and Tunable Biodegradation Rates

RSC - Polym. Chem. latest articles - Tue, 02/07/2017 - 04:31
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00182G, CommunicationChih-Chia Cheng, Jyun-Jie Huang, Zhi-Sheng Liao, Shan-You Huang, D. J. Lee, Zhong Xin
Biodegradable nucleobase-functionalized supramolecular polymers, a combination of complementary uracil-adenine (U-A) interactions and a binary blend of two different synthetic biopolymers, have been successfully developed and undergo effective spontaneous assembly into...
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Synthesis and biological properties of water-soluble polyphenylthiophene brushes with poly(ethylene glycol)/polyzwitterion side chains

RSC - Polym. Chem. latest articles - Tue, 02/07/2017 - 03:31
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C6PY01941B, PaperYajun Zhang, Zhengkui Zhang, Changren Liu, Weizhi Chen, Cheng Li, Wei Wu, Xiqun Jiang
Two types of water-soluble molecular brushes with a poly(3-phenylthiophene) (PPT) backbone tethering poly(ethylene glycol) (PEG) and zwitterionic poly(carboxybetaine) (PCB) side chains were synthesized and named PPTPEG and PPTPCB, respectively. Atomic...
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Categories: Polymer Science News

Factors Affecting Bottlebrush Polymer Synthesis by the Transfer-to Method Using Reversible Addition-Fragmentation Chain Transfer (RAFT) Polymerization

RSC - Polym. Chem. latest articles - Mon, 02/06/2017 - 10:25
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C6PY01982J, PaperScott Radzinski, Jeff Foster, Sally E Lewis, Eric V French, John Matson
The transfer-to method is a unique way to prepare bottlebrush polymers by reversible addition-fragmentation chain transfer (RAFT) polymerization. This little-studied bottlebrush polymer synthesis strategy is distinct from the grafting-from, grafting-to,...
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Categories: Polymer Science News

Preparation of a Highly Reactive Polymer Click Reagent, PEG Nitrile N-Oxide, and its Application to Block and Star Polymer Synthesis

RSC - Polym. Chem. latest articles - Mon, 02/06/2017 - 03:21
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00100B, CommunicationToyokazu Tsutsuba, Hiromitsu Sogawa, Toshikazu Takata
The polymer nitrile N-oxide containing poly(ethylene glycol) (PEG) skeleton PEG-CNO was synthesized via the stepwise reaction. The catalyst-free click reaction of PEG-CNO with terminal C=C bond-tethering compounds afforded corresponding diblock...
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Categories: Polymer Science News

Dual-stimuli responsive liposomes using pH- and temperature-sensitive polymers for controlled transdermal delivery

RSC - Polym. Chem. latest articles - Fri, 02/03/2017 - 05:45

Polym. Chem., 2017, Advance Article
DOI: 10.1039/C6PY01754A, PaperNaoko Yamazaki, Takumi Sugimoto, Mitsuhiro Fukushima, Ryoma Teranishi, Aki Kotaka, Chiharu Shinde, Takayuki Kumei, Yasushi Sumida, Yuki Munekata, Kei-ichi Maruyama, Eiji Yuba, Atsushi Harada, Kenji Kono
The use of skin environment-sensitive liposomes for transdermal penetration is beneficial for improving cosmetic efficacy.
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Categories: Polymer Science News

Fluorescent RAFT polymers bearing a nitrilotriacetic acid (NTA) ligand at the [small alpha]-chain-end for the site-specific labeling of histidine-tagged proteins

RSC - Polym. Chem. latest articles - Fri, 02/03/2017 - 04:45
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C6PY02222G, CommunicationDamien Duret, Zofia Haftek-Terreau, Matthieu Carretier, Catherine LADAVIERE, Marie-Therese Charreyre, Arnaud Favier
Site-specific labeling of proteins is a valuable tool to study biological processes. We show that it can be achieved using fluorescent polymer probes synthesized by RAFT polymerization. Thanks to an...
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Categories: Polymer Science News

Injectable Shear-Thinning Hydrogel with Enhanced Strength and Temperature Stability by POSS End-Group Aggregation

RSC - Polym. Chem. latest articles - Fri, 02/03/2017 - 03:45
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C6PY02180H, CommunicationXiaoniu Yang, Zezhao Qin, Baoliu Qu, Liguang Yuan, Xiaofeng Yu, Jinge Li, Jie Wang, Hongying Lv
A strategy based on physical association of POSS end groups was designed to reinforce the shear-thinning hydrogels. Hydrogel made of POSS-capped copolymer features significantly enhanced mechanical strength and thermal stability....
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Categories: Polymer Science News

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