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835 Aktuelle Fachpublikationen zum Thema temperature

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Functionalization of Poly(2,6-dimethyl-1,4-phenylene oxide)s with Hindered Fluorene Side Chains for Anion Exchange Membranes

22.04.2016 | Liang Zhu; Jing Pan; Caroline M. Christensen; Bencai Lin; Michael A. Hickner, Macromolecules, 2016

Functionalization of poly(2,6-dimethyl-1,4-phenylene oxide)s (PPO) was achieved by grafting hindered fluorene-based side chains to PPO via the Suzuki–Miyaura coupling reaction using an appropriate catalyst/ligand system. Using the resulting functionalized PPO, anion-conductive copolymers, PPO ...

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Hygromorphic Polymers: Synthesis, Retro-Michael Reaction, and Humidity-Driven Actuation of Ester–Sulfonyl Polyimides and Thermally Derived Copolyimides

19.04.2016 | David H. Wang; Ruel N. McKenzie; Philip R. Buskohl; Richard A. Vaia; Loon-Seng Tan, Macromolecules, 2016

With a view toward broadening the adaptive capability of polyimide-based systems that have been shown to be mechanically responsive to light, heat, and thermal-electrical stimuli, a simple diamine containing a highly polar ester–sulfonyl (ES) pendant was synthesized via a two-step route. It was ...

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A Robust Cross-Linking Strategy for Block Copolymer Worms Prepared via Polymerization-Induced Self-Assembly

13.04.2016 | J. R. Lovett; L. P. D. Ratcliffe; N. J. Warren; S. P. Armes; M. J. Smallridge; R. B. Cracknell; B. R. Saunders, Macromolecules, 2016

A poly(glycerol monomethacrylate) (PGMA) chain transfer agent is chain-extended by reversible addition–fragmentation chain transfer (RAFT) statistical copolymerization of 2-hydroxypropyl methacrylate (HPMA) with glycidyl methacrylate (GlyMA) in concentrated aqueous solution via ...

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Crystalline Polythiocarbonate from Stereoregular Copolymerization of Carbonyl Sulfide and Epichlorohydrin

12.04.2016 | Tian-Jun Yue; Wei-Min Ren; Ye Liu; Zhao-Qian Wan; Xiao-Bing Lu, Macromolecules, 2016

Carbonyl sulfide (COS) as a carbon source for copolymerization with epoxides has recently received some attention. The introduction of sulfur atom can provide enhancement of important polymer properties compared to the corresponding copolymer from CO2. However, the synthesized copolymers are all ...

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Designing Thermally Stable Conjugated Polymers with Balanced Ambipolar Field-Effect Mobilities by Incorporating Cyanovinylene Linker Unit

05.04.2016 | Jun-Mo Park; Sang Kyu Park; Won Sik Yoon; Jin Hong Kim; Dong Won Kim; Tae-Lim Choi; Soo Young Park, Macromolecules, 2016

We present a developed highly balanced and thermally stable ambipolar semiconducting polymer PBCDC consisting of diketopyrrolo[3,4-c]pyrrole and benzo[1,2-b:4,5-b′]dithiophene building blocks connected by a cyanovinylene linker unit. Stabilization of the frontier molecular orbitals and ...

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Azo-Containing Polymers with Degradation On-Demand Feature

05.04.2016 | Mathieu A. Ayer; Yoan C. Simon; Christoph Weder, Macromolecules, 2016

Molecules comprising aliphatic azo moieties are widely used as radical polymerization initiators, but only a few studies have explored their usefulness as stimuli-responsive motifs in macromolecular constructs. The controlled degradation of azo-containing polymers has indeed remained largely ...

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Formation of Multidomain Hydrogels via Thermally Induced Assembly of PISA-Generated Triblock Terpolymer Nanogels

05.04.2016 | Youcheng Li; Zhangxin Ye; Liangliang Shen; Yuanyuan Xu; Anqi Zhu; Peiyi Wu; Zesheng An, Macromolecules, 2016

Polymerization-induced self-assembly (PISA) is a rapidly evolving method for the efficient preparation of well-defined nano-objects. PISA-generated nano-objects have been explored in this work for the responsive formation of multidomain hydrogels by thermally induced assembly of doubly ...

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In Situ Synthesis of Thermoresponsive Polystyrene-b-poly(N-isopropylacrylamide)-b-polystyrene Nanospheres and Comparative Study of the Looped and Linear Poly(N-isopropylacrylamide)s

01.04.2016 | Wei Wang; Chengqiang Gao; Yaqing Qu; Zefeng Song; Wangqing Zhang, Macromolecules, 2016

Well-defined triblock copolymer nanospheres of polystyrene-block-poly(N-isopropylacrylamide)-block-polystyrene (PS-b-PNIPAM-b-PS) containing a hydrophobic core of the polystyrene (PS) block and a looped corona of the thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) block were prepared by the ...

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Non-Equilibrium Dynamics of Vesicles and Micelles by Self-Assembly of Block Copolymers with Double Thermoresponsivity

01.04.2016 | Yu-Hang Tang; Zhen Li; Xuejin Li; Mingge Deng; George Em Karniadakis, Macromolecules, 2016

We present a mesoscopic simulation study of doubly thermoresponsive self-assemblies, revealing previously unknown dynamic behavior and proving experimental hypotheses. By explicitly modeling internal energy as a degree of freedom of coarse-grained particles, we simulated the thermally induced ...

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Synthesis of Functional Polycaprolactones via Passerini Multicomponent Polymerization of 6-Oxohexanoic Acid and Isocyanides

31.03.2016 | Jian Zhang; Mei Zhang; Fu-Sheng Du; Zi-Chen Li, Macromolecules, 2016

We describe a straightforward strategy for a new family of functional polycaprolactones (PCL) via the Passerini multicomponent polymerization (P-MCP) of 6-oxohexanoic acid and various isocyanides. Room temperature polymerization of tert-butyl isocyanide (1), 2,6-dimethylphenyl isocyanide (2), ...

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