Polymer Science News

Thermosensitive Spontaneous Gradient Copolymers with Block- and Gradient-like Features

RSC - Polym. Chem. latest articles - Wed, 04/19/2017 - 07:01
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00495H, PaperRoberto Yanez-Macias, Ihor Kulai, Jens Ulbrich, Turgay Yildirim, Pelin Sungur, Stephanie Hoeppener, Ramiro Guerrero-Santos, Ulrich Sigmar Schubert, Mathias Destarac, Carlos Guerrero-Sanchez, Simon Harrisson
Reversible addition-fragmentation chain transfer (RAFT) copolymerization was used to prepare copolymers of N-isopropyl acrylamide (NIPAM) and vinyl acetate (VAc) and with mole fractions of NIPAM ranging from 0.1 to 0.6...
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Comparison of photo- and thermally initiated polymerization-induced self-assembly: a lack of end group fidelity drives the formation of higher order morphologies

RSC - Polym. Chem. latest articles - Wed, 04/19/2017 - 07:01

Polym. Chem., 2017, Advance Article
DOI: 10.1039/C7PY00407A, PaperLewis D. Blackman, Kay E. B. Doncom, Matthew I. Gibson, Rachel K. O'Reilly
We demonstrate that the PISA of identical block copolymers by either a photo or thermally initiated approach leads to structures that are both chemically and morphologically distinct.
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Chalcogenide Hybrid Inorganic/Organic Polymers (CHIPs) via Inverse Vulcanization and Dynamic Covalent Polymerizations

RSC - Polym. Chem. latest articles - Wed, 04/19/2017 - 06:00
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00587C, PaperJeffrey Pyun, Yueyan Zhang, Katrina Konopka, Richard S. Glass, Kookheon Char
We report on the preparation and modification of chalcogenide hybrid inorganic/organic polymer (CHIPs) via the inverse vulcanization of elemental sulfur with styrenics to afford low glass transition (Tg) copolymers. Furthermore,...
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Categories: Polymer Science News

Thermo Conductive Carbon Nanotube-framed Membrane for Skin Heat Signal-Responsive Transdermal Drug Delivery

RSC - Polym. Chem. latest articles - Wed, 04/19/2017 - 06:00
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00570A, PaperUeon Sang Shin, Ji-Hye Kang, Han-Sem Kim
Smart carbon nanotube (CNT)-framed (SCNF) membranes were prepared by self-assembling of highly thermo conductive CNT molecules hybridized with chitosan (Chit) in a core-shell structure and then by chemical integration of...
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Categories: Polymer Science News

Mechanistic Investigation of the Ring Opening Metathesis Polymerisations of Alkoxy and Alkyl Substituted Paracyclophanedienes

RSC - Polym. Chem. latest articles - Wed, 04/19/2017 - 06:00
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00543A, PaperDharam Kumar, Benjamin Lidster, Ralph W. Adams, Michael Turner
This paper discusses the living nature of the ring opening metathesis polymerisation (ROMP) of alkoxy and alkyl substituted [2.2] paracyclophane-1,9-dienes (M1 and M2), initiated with Grubbs' second and third generation...
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Acetone-water biphasic mixtures as solvents for ultrafast SET-LRP of hydrophobic acrylates

RSC - Polym. Chem. latest articles - Wed, 04/19/2017 - 06:00
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00557A, PaperRauan Smail, Ryan L. Jezorek, Janis Lejnieks, Mojtaba Enayati, Silvia Grama, Michael Monteiro, Virgil Percec
Acetone is an excellent solvent for polymers including poly(acrylate)s and a well understood and established reagent for organic synthesis. Therefore, it is surprising that being also the least expensive organic...
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Categories: Polymer Science News

Estimating the Photodissociation Quantum Yield from PLP-SEC Peak Heights

RSC - Polym. Chem. latest articles - Wed, 04/19/2017 - 05:00
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00412E, PaperYoshi Marien, Paul Van Steenberge, Katrin Blandine Kockler, Christopher Barner-Kowollik, Marie-Francoise Reyniers, Guy B. Marin, Dagmar D'hooge
A fast method for the reliable estimation of the photodissociation quantum yield [capital Phi]diss is presented. Pulsed laser polymerization (PLP) experiments are performed at various pulse energies (1.5 - 6 mJ)...
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Water-based acrylic coatings reinforced by PISA-derived fibres

RSC - Polym. Chem. latest articles - Mon, 04/17/2017 - 07:39
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00302A, CommunicationRichard Albiges, Pauline Klein, Stephanie Roi, Francois Stoffelbach, Costantino Creton, Laurent Bouteiller, Jutta Rieger
Polymerization-induced self-assembly (PISA) is an efficient approach to synthesize self-assembled core-shell nanofibres in water, based on amphiphilic block copolymers. We demonstrate here for the first time that such anisotropic and...
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A broad scope of aliphatic polyesters prepared by elimination of small molecules from sustainable 1,3-dioxolan-4-ones

RSC - Polym. Chem. latest articles - Mon, 04/17/2017 - 07:39
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00254H, PaperStefan A Cairns, Amelie Schultheiss, Michael Patrick Shaver
Biodegradable aliphatic polyesters built from sustainable feedstocks are one of the most promising solutions to address the pollution and oil-dependence challenges of modern plastics, but remain limited in monomer scope...
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Categories: Polymer Science News

Polymerization Induced Self-Assembly: Tuning of Morphology using Ionic Strength and pH

RSC - Polym. Chem. latest articles - Mon, 04/17/2017 - 05:38
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00552K, PaperDewen Zhou, Per Bo Zetterlund, Siming Dong, Sebastien Perrier, Rhiannon P. Kuchel
Investigations of RAFT dispersion polymerization-induced self-assembly (PISA) of 2-hydroxypropyl methacrylate (HPMA) in water/methanol at 60 oC using a cationically charged macroRAFT agent as stabilizer block, namely P(N,N-diethylaminoethyl methacrylate)-stat-poly((ethylene glycol) methyl...
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A new thermoresponsive polymer of poly(N-acryloylsarcosine methyl ester) with tunable LCST

RSC - Polym. Chem. latest articles - Mon, 04/17/2017 - 04:38
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00274B, PaperShengli chen, Ke Wang, Wangqing Zhang
Poly(N-acryloylsarcosine methyl ester) (PNASME), a thermoresponsive N-ester substituted polyacrylamide has well-defined molecular weight and low Ð, was synthesized by solution RAFT polymerization. The synthesized PNASME exhibited a cloud point temperature...
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Two novel supramolecular metallogels constructed by platinum(II) coordination and pillar[5]arene-based host-guest interactions

RSC - Polym. Chem. latest articles - Mon, 04/17/2017 - 04:38
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00280G, Communicationzhengtao li, Hao Xing, Bingbing Shi
Two architecturally controlled supramolecular metallogels have been fabricated by unifying the themes of coordination-driven self-assembly and pillararene-based molecular recognition.
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Categories: Polymer Science News

Preparation of Sulfonic Acid Functional Proton Conducting Phosphazenes by Covalent Protection

RSC - Polym. Chem. latest articles - Mon, 04/17/2017 - 04:38
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00189D, PaperElif Busra Celebi, Ferda Hac[i without dot]velioglu
An easy and efficient method has been developed to prepare sulfonic acid functional cyclic and polymeric phosphazenes. Hexa(ethyl 4-oxybenzenesulfonate)cyclotriphosphazene and its sulfonic acid derivative, hexa(4-oxybenzenesulfonic acid)cyclotriphosphazene were succesfully synthesized. Fully...
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Application of oxygen tolerant PET-RAFT to polymerization-induced self-assembly

RSC - Polym. Chem. latest articles - Thu, 04/13/2017 - 11:08

Polym. Chem., 2017, Advance Article
DOI: 10.1039/C7PY00442G, PaperGervase Ng, Jonathan Yeow, Jiangtao Xu, Cyrille Boyer
The inhibitory effects of molecular oxygen in PET-RAFT polymerization can be overcome by the addition of singlet oxygen quenchers. This oxygen tolerant approach is compatible with a range of organic solvents and can be used to synthesize nanoparticles according to a PISA process.
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Categories: Polymer Science News

A pH, Glucose, and Dopamine Triple-responsive, Self-healable Adhesive Hydrogel Formed by Phenylborate-Catechol Complexation

RSC - Polym. Chem. latest articles - Thu, 04/13/2017 - 06:07
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00519A, PaperMeng Shan, Chu Gong, Bingqiang Li, Guolin Wu
An injectable polyethylene glycol (PEG) hydrogel was successfully prepared via borate-catechol complexation using dopamine functionalized 4-armed PEG (4-arm-PEG-DA) and phenylboronic acid modified 4-armed PEG (4-arm-PEG-PBA). The hydrogel was formed within...
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Categories: Polymer Science News

Tandem Modification of Amphiphilic Cellulose Ethers for Amorphous Solid Dispersion via Olefin Cross-metathesis and Thiol-Michael Addition

RSC - Polym. Chem. latest articles - Wed, 04/12/2017 - 15:00
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00228A, PaperYifan Dong, Laura Mosquera-Giraldo, Lynne Taylor, Kevin J. Edgar
Olefin cross-metathesis (CM) has been shown to be a valuable, versatile strategy for modifications of cellulose derivatives with appended olefin "handles". This synthetic method provides access to polysaccharide derivatives with...
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Categories: Polymer Science News

Light-Responsive Terpolymers Based on Polymerizable Photoacids

RSC - Polym. Chem. latest articles - Wed, 04/12/2017 - 14:00
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00571G, PaperFelix Wendler, Kilian Schneider, Benjamin Dietzek, Felix Helmut Schacher
We present the synthesis and characterization of amphiphilic terpolymers containing photoacids based on 1-naphthol using reversible addition fragmentation chain transfer radical polymerization (RAFT). The respective poly(methyl methacrylate-co-2-(N,N-dimethylamino)ethyl methacrylate-co-1-naphthol methacrylate/methacrylamide) P[MMAx-co-DMAEMAy-co-NMAz/NMAmz]...
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Morphology design and control of polymer particles by regulating droplet flowing mode in microfluidic chips

RSC - Polym. Chem. latest articles - Wed, 04/12/2017 - 14:00
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00440K, PaperRui Chen, Xiang Chen, Xin Jin, Xinyuan Zhu
In this work, a new strategy for morphology design and control of polymer particles was developed by regulating droplet flowing mode in microfluidic chips. Firstly, a simple droplet microfluidic chip...
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Categories: Polymer Science News

Schizophrenic poly(ε-caprolactone)s: synthesis, self-assembly and fluorescent decoration

RSC - Polym. Chem. latest articles - Wed, 04/12/2017 - 13:00
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00461C, PaperJun Zhang, Yan Xiao, Xueli Luo, Lianlei Wen, Andreas Heise, Meidong Lang
Double hydrophilic block copolymers (DHBCs) based on poly(ε-caprolactone)s, poly(6-acetoxyl-ε-caprolactone)-b-poly(4-N-piperilactone) (PCCL-b-PPIL), were synthesized via ring-opening polymerization and deprotection. Self-assembly behaviour of these block copolymers in aqueous solution was thoroughly explored via...
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Synthesis of a Self-Healing Siloxane-Based Elastomer Cross-Linked via a Furan-Modified Polyhedral Oligomeric Silsesquioxane: Investigation of a Thermally Reversible Silicon-Based Cross-Link

RSC - Polym. Chem. latest articles - Wed, 04/12/2017 - 11:59
Polym. Chem., 2017, Accepted Manuscript
DOI: 10.1039/C7PY00215G, PaperAmin Nasresfahani, Paul M Zelisko
We have successfully prepared an elastomeric material exhibiting excellent temperature-controlled self-healing characteristics. A synthetic procedure is provided to graft siloxane chains with maleimidocarboxyphenyl functional groups. A furan-modified polyhedral oligomeric silsesquioxane...
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