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New approach for producing fluorescent gold nanoparticles: Poly(ethylene oxide) homopolymers as reductants in the micelles of amphiphilic fluorosilicone‐containing block copolymers

24-Jul-2015 | Jiawen Zhang, Lingmin Yi, Kai Xu, Jing Li, Dongzhi Lai, Journal of Polymer Science Part A: Polymer Chemistry, 2015

The reduction of gold salts by poly(ethylene oxide) (PEO) homopolymer is very slow and more than 2 days is needed to produce gold nanoparticles (AuNPs). In this work, however, AuNPs are rapidly produced in the micelles of novel amphiphilic ...

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Thermoresponsive polymersome from a double hydrophilic block copolymer

30-Jun-2015 | Prithankar Pramanik, Suhrit Ghosh, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT The article describes synthesis and thermally triggered self‐assembly of a Poly (ethylene oxide)‐block‐poly (N‐insopropylacrylamide) (PEO‐b‐PNIPAm) in aqueous medium. At rt, the polymer remains as unimer, however, at lower critical solution temperature (LCST) of PNIPAm (32 °C), it ...

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Thermo‐ and pH‐sensitive triblock copolymers with tunable hydrophilic/hydrophobic properties

26-Jun-2015 | Christophe Pottier, Gaëlle Morandi, Virginie Dulong, Zied Souguir, Luc Picton, Didier Le Cerf, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT Polymers consisting of poly(acrylic acid) (PAA) and statistical poly[(acrylic acid)‐co‐(tert‐butylacrylate)] (P(AA‐co‐tBA)), attached to both extremities of Jeffamine® (D series based on a poly(propylene oxide) (PPO) with one amine function at each end) using atom transfer radical ...

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Synthesis, Characterization, and thermoresponsive properties of Helical Polypeptides Derivatized from Poly(γ−4‐(3‐chloropropoxycarbonyl)benzyl‐L‐glutamate)

23-Jun-2015 | Yong Deng, Xi Wang, Qiulin Yuan, Mengxiang Zhu, Ying Ling, Haoyu Tang, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT A series of side‐chain‐functionalized α‐helical polypeptides, i.e., poly(γ‐4‐(3‐chloropropoxycarbonyl)benzyl‐L‐glutamate) (6) have been prepared from n‐butylamine initiated ring‐opening polymerization (ROP) of γ‐4‐(3‐chloropropoxycarbonyl)benzyl‐L‐glutamic acid‐based ...

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Poly(thieno[3,4‐b]‐1,4‐oxathiane) and poly(3,4‐ethylenedioxythiophene‐co‐thieno[3,4‐b]‐1,4‐oxathiane)/poly(styrene sulfonic sodium): Preparation, characterization, and optoelectronic performance

12-Jun-2015 | Zhipeng Wang, Daize Mo, Shuai Chen, Jingkun Xu, Baoyang Lu, Qinglin Jiang, Zilan Feng, Jinhua Xiong, Shijie Zhen, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT In this work, the asymmetrical analog of 3,4‐ethylenedioxythiophene (EDOT), thieno[3,4‐b]‐1,4‐oxathiane (EOTT), was synthesized and chemically polymerized first in aqueous solution using poly(styrene sulfonic sodium) (PSS) as the polyelectrolyte to yield ...

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Facile synthesis of poly(DMC‐co‐HPA) hydrogels via infrared laser ignited frontal polymerization and their adsorption–desorption switching performance

12-Jun-2015 | Yang Li, Shengyang Yang, Cai‐Feng Wang, Su Chen, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT In this work, we report a versatile infrared laser ignited frontal polymerization technique for the fabrication of a series of poly(DMC‐co‐HPA) hydrogels (DMC = methacryloxyethyltrimethyl ammonium chloride, HPA = hydroxypropyl acrylate). Because the method is based on the exothermic ...

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Synthesis and characterization of benzimidazolium‐functionalized polysulfones as anion‐exchange membranes

21-May-2015 | María Teresa Pérez‐Prior, Alejandro Várez, Belén Levenfeld, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT Anion‐exchange membranes containing pendant benzimidazolium groups were synthesized from polysulfone by chrolomethylation followed by nucleophilic substitution reaction with 1‐methylbenzimidazole. The structures of the polymers were characterized by 1H‐NMR and FTIR analysis. The ...

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Boron subphthalocyanine polymers: Avoiding the small molecule side product and exploring their use in organic light‐emitting diodes

20-May-2015 | Benoît H. Lessard, Kathleen L. Sampson, Trevor Plint, Timothy P. Bender, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT In this study, we set out the steps to efficiently synthesize boron subphthalocyanine (BsubPc)‐containing polymers while circumventing the formation of a known side product. The synthesis was achieved using the post‐polymerization coupling reaction of a carboxylic acid functional ...

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RAFT polymerization in supercritical carbon dioxide based on an induced precipitation approach: Synthesis of 2‐ethoxyethyl methacrylate/acrylamide block copolymers

13-May-2015 | Gerard Hawkins, Per B. Zetterlund, Fawaz Aldabbagh, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT A new controlled/living heterogeneous polymerization technique using RAFT in benign supercritical CO2 is described involving the formation of monomer‐swollen seed particles by precipitation of macroRAFT agent prior to polymerization. Controlled/living character of the induced ...

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Fabrication and characterization of UV‐crosslinkable thermoresponsive composite fibers with magnetic properties

07-May-2015 | Shih‐Ru Huang, King‐Fu Lin, Trong‐Ming Don, Wen‐Yen Chiu, Mei‐Fei Lin, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT Crosslinking magnetic thermoresponsive composite (MTC) fiber mats were fabricated by electrospinning process and followed by UV curing. Thermoresponsive poly‐(N‐isopropylacrylamide) (PNIPAAm) and magnetic Fe3O4 were firstly synthesized by redox‐initiated polymerization and ...

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