Polymer Science News

Branching and Molar Mass Analysis of Low Density Polyethylene Using the Multiple Preparative Fractionation Concept

RSC - Polym. Chem. latest articles - Thu, 02/08/2018 - 07:47
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY02076G, PaperHarald Pasch, Paul Severin Eselem Bungu
Despite being a homopolymer, low density polyethylene (LDPE) exhibits a complex molecular structure that is determined by multiple molar mass and branching distributions. For a comprehensive microstructural analysis, preparative fractionation...
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Recyclable Heat-resisting Polymer Poly(ether azaindole ketone)-H+ via Hydrogen Bonding Crosslinking

RSC - Polym. Chem. latest articles - Wed, 02/07/2018 - 10:22
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY02097J, CommunicationQiang Yin, Yonghong Peng, Shuai Zhang, Fanghua Zhu, Wa Li, Du Kai
A Chemical crosslinked heat-resisting polymers have many industrial applications, but are difficult to recycle or rework. We ingeniously prepared a novel recyclable hydrogen bonding crosslinked polymer PEAINKH+, which possesses outstanding...
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Categories: Polymer Science News

Thiol-substituted copolylactide: synthesis, characterization and post-polymerization modification using thiol-ene chemistry

RSC - Polym. Chem. latest articles - Wed, 02/07/2018 - 07:18

Polym. Chem., 2018, Advance Article
DOI: 10.1039/C7PY01930K, PaperPranav P. Kalelkar, David M. Collard
A copolylactide that is substituted with pendent thiol groups (thiol-PL) undergoes coupling with a variety of electrophiles under mild conditions via thiol-ene addition.
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Categories: Polymer Science News

Boron "Stitching" Reaction: A Powerful Tool for the Synthesis of Polyethylene-Based Star Architectures

RSC - Polym. Chem. latest articles - Wed, 02/07/2018 - 07:18
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C8PY00110C, CommunicationGeorgios Zapsas, Konstantinos Ntetsikas, Joey Kim, Panayiotis Bilalis, Yves Gnanou, Nikos Hadjichristidis
The linking of macroanions with BF3OEt2 leads to a 3-arm star with boron junction point, which can serve as macroinitiator for the polyhomologation of dimethyl sulfoxonium methylide and thus enabling...
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Categories: Polymer Science News

High-throughput physicochemical analysis of thermoresponsive polymers

RSC - Polym. Chem. latest articles - Wed, 02/07/2018 - 07:18
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY02066J, CommunicationSimon Bou, Ashley R Connolly, Amanda V. Ellis
Calculating the lower critical solution temperature (LCST) of a thermoresponsive polymer is an important measure of its physical properties. Here, the LCST of poly(N-isopropylacrylamide) (pNIPAM) was determined by measuring the...
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Categories: Polymer Science News

Regioselective Living Polymerization of Allylcyclohexane and Precise Synthesis of Hydrocarbon Block Copolymers with Cyclic Units

RSC - Polym. Chem. latest articles - Wed, 02/07/2018 - 04:15
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C8PY00047F, PaperJie Gao, Zonghang Ying, Liu Zhong, Heng Liao, Haiyang Gao, Wu Qing
Precise control over macromolecular structure is a central goal and remains a great challenge in synthetic polymer chemistry. We report herein living isomerization polymerization of allycyclohexane (ACH) using [small alpha]-diimine nickel...
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Categories: Polymer Science News

Scandium-Catalyzed Copolymerization of Myrcene with Ethylene and Propylene: Convenient Syntheses of Versatile Functionalized Polyolefins

RSC - Polym. Chem. latest articles - Wed, 02/07/2018 - 04:15
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C8PY00039E, PaperXiaorui Ren, Fang Guo, Hongran Fu, Yunyun Song, Yang Li, Zhaomin Hou
The copolymerization of myrcene with ethylene and propylene by use of half-sandwich scandium complexes bearing various auxiliary ligands have been examined. In the copolymerization of myrcene with ethylene, the THF-free...
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Categories: Polymer Science News

An all-in-one memory cell based on a homopolymer with pyrene side chain and its volatile and nonvolatile resistive switch behaviors

RSC - Polym. Chem. latest articles - Tue, 02/06/2018 - 08:45
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY01925D, PaperHongliang Wang, Feng Zhou, Linxin Wu, Xiong Xiao, Peiyang Gu, Jun Jiang, Qingfeng Xu, Jian-Mei Lu
Due to their processablity and flexibility, nanosheets of functional polymers showed promising application in high capacity memories and flexional organic electronics. In this paper, we are interested in preparing homopolymer...
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Categories: Polymer Science News

Synthesis of indocyanine green functionalized comblike poly(aspartic acid) derivatives for enhanced cancer cell ablation by targeting endoplasmic reticulum

RSC - Polym. Chem. latest articles - Tue, 02/06/2018 - 06:44
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY01994G, PaperJiaxun Wan, Luyan Sun, Pan Wu, Fang Wang, Jia Guo, Jianjun Cheng, Changchun Wang
Undesired gene expression can lead to severe disease such as cancers. Oncogenic proteins or survival factors encoded by oncogenes can sustain cancer cell survival and proliferation. Considering proteins are manufactured...
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Categories: Polymer Science News

In situ synthesis of diblock copolymer nano-assemblies via dispersion RAFT polymerization induced self-assembly and Ag/copolymer composite nanoparticles thereof

RSC - Polym. Chem. latest articles - Sun, 02/04/2018 - 23:57
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY01905J, PaperMengting Tan, Yan Shi, Zhi-Feng Fu, Wantai Yang
One pot in situ preparation of poly(acrylic acid)-block-polystyrene (PAA-b-PSt) or poly(acrylic acid)-block-poly(acrylic acid-ran-styrene) (PAA-b-P(AA-r-St)) diblock copolymer nano-objects with multiple morphologies was developed through dispersion RAFT polymerization in ethanol/water mixture mediated...
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Amino acid-derived stimuli-responsive polymers and their applications

RSC - Polym. Chem. latest articles - Tue, 01/30/2018 - 09:55
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY02014G, Review ArticleKamal Bauri, Mridula Nandi, Priyadarsi De
Natural biopolymers such as proteins and nucleic acids in living organisms possess inherent ability to respond to local environmental stimuli, which motivated the researchers to make biomolecules-derived non-biological macromolecules with...
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Categories: Polymer Science News

Palladium-polymer nanoreactors for the aqueous asymmetric synthesis of therapeutic flavonoids

RSC - Polym. Chem. latest articles - Tue, 01/30/2018 - 05:35

Polym. Chem., 2018, Advance Article
DOI: 10.1039/C7PY02050C, CommunicationE. Lestini, L. D. Blackman, C. M. Zammit, T. Chen, R. J. Williams, M. Inam, B. Couturaud, R. K. O'Reilly
Polymeric core-shell micelles incorporating a chiral palladium pyridinooxazoline catalyst are presented as nanoreactors for the aqueous asymmetric synthesis of flavanones, a class of flavonoids, with therapeutic properties.
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Terpyridine-Functionalized Stimuli-Responsive Microgels and Their Assembly Through Metal-Ligand Interaction

RSC - Polym. Chem. latest articles - Tue, 01/30/2018 - 04:27
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C8PY00016F, PaperJookyung Lee, Eun Jung Choi, Imre Varga, Per M. Claesson, Sang-Ho Yun, Changsik Song
We developed a terpyridine-functionalized microgel (tpy-mG) for its supramolecular assembly. tpy-mG was synthesized by amidation between 3-(4-([2,2':6',2''-terpyridin]-4'-yl)phenoxy)propan-1-amine and carboxylates of thermo-responsive p(NIPAM-co-MMA) microgel (A-mG), which was synthesized by emulsion polymerization....
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Highly efficient polymerization via Sulfur(VI)-fluoride exchange (SuFEx): Novel polysulfates bearing a pyrazoline-naphthylamide conjugated moiety and their electrical memory performance

RSC - Polym. Chem. latest articles - Sun, 01/28/2018 - 22:14
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY02042B, PaperXiong Xiao, Feng Zhou, Jun Jiang, Haifeng Chen, Lihua Wang, Dongyun Chen, Qingfeng Xu, Jian-Mei Lu
Two functional polysulfates (PolyTPP-NI and CPTPP-NI) bearing large conjugated chains, were obtianed via a sulfur(VI) fluoride click reaction in high yield under mild reaction conditions. The corresponding solution-processed sandwiched memory...
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Categories: Polymer Science News

Nitroxide radical polymers - a versatile material class for high-tech applications

RSC - Polym. Chem. latest articles - Fri, 01/26/2018 - 08:39
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY02001E, Review ArticleKai-Anders Hansen, James P Blinco
Nitroxides are a versatile class of stable free radicals that have long established themselves in a wide range of applications. Their incorporation into macromolecular architecture has added a further dimension...
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Categories: Polymer Science News

Squalene/polyethylenimine based non-viral vectors: synthesis and use in systems for sustained gene release

RSC - Polym. Chem. latest articles - Thu, 01/25/2018 - 04:40

Polym. Chem., 2018, Advance Article
DOI: 10.1039/C7PY01720K, PaperGeta David, Lilia Clima, Manuela Calin, Cristina Ana Constantinescu, Mihaela Balan-Porcarasu, Cristina Mariana Uritu, Bogdan C. Simionescu
New squalene/BPEI conjugates, acting as efficient gene carriers, were included in the 3D matrix, yielding tunable DNA release and long-term bioavailability.
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Donor-Acceptor Conjugated Ladder Polymer via Aromatization-Driven Thermodynamic Annulation

RSC - Polym. Chem. latest articles - Wed, 01/24/2018 - 07:31
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY02059G, PaperJongbok Lee, Alexander Kalin, Chenxu Wang, Julia Early, Mohammed Al-Hashimi, Lei Fang
Composed of alternating electron-rich and electron-deficient repeating units in a fused rigid backbone, donor-acceptor conjugated ladder polymers represent a class of promising material candidates possessing a host of intriguing properties....
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Categories: Polymer Science News

Synthesis and Properties of poly(trifluoroethylene) via a persistent radical mediated polymerization of trifluoroethylene

RSC - Polym. Chem. latest articles - Wed, 01/24/2018 - 05:14
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY02018J, PaperMaxime Colpaert, Sanjib Banerjee, Vincent Ladmiral, Taizo Ono, Bruno Ameduri
Conventional radical homopolymerization of TrFE initiated by a [round bullet, filled]CF3 radical (generated in situ from perfluoro-3-ethyl-2,4-dimethyl-3-pentyl persistent radical, PPFR) is presented. Reactions were carried out at increasing PPFR concentration (initial [TrFE]0:[PPFR]0...
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Triaryl-1,4-diamine based polysquaraines: effect of co-solvent and monomer insertion on optoelectronic properties

RSC - Polym. Chem. latest articles - Wed, 01/24/2018 - 03:39
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY02056B, CommunicationGuillaume Garbay, Tiphaine Tailliez, Eleni Pavlopoulou, Jules Oriou, Mickael Bezirdjoglou, Georges Hadziioannou, Eric Cloutet, Cyril Brochon
A series of N1,N4-didodecyl-N1,N4-diphenylbenzene-1,4-diamine based polysquaraines have been synthesized under micro-wave irradiation in the absence of any catalyst. The effect of solvent of polymerization, on the squaric acid catenation (1,2...
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Syntheses, Characterizations and Functions of Cationic Polyethers with Imidazolium-Based Ionic Liquid Moieties

RSC - Polym. Chem. latest articles - Wed, 01/24/2018 - 02:35
Polym. Chem., 2018, Accepted Manuscript
DOI: 10.1039/C7PY01985H, PaperShigetaka Hayano, Keisuke Ota, The Ban Hoang
Cationic polyethers with imidazolium-based ionic liquid moieties were synthesized and characterized thoroughly for their properties and functions. Poly(epichlorohydrin) (poly(ECH)) was quaternized by 1-methylimidazole to provide a poly(N-glycidyl-N'-methylimidazolium chloride) (poly(ECH-MeIm+Cl-)). Anion...
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