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362 Aktuelle Fachpublikationen zum Thema temperature

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Design, polymerization, and properties of polyurethane elastomers from miscible, immiscible, and hybridized seed‐oil derived soft segment blends

11.11.2014 | Mark F. Sonnenschein, Valeriy V. Ginzburg, Adam L. Grzesiak, Klaus Schiller, Benjamin L. Wendt, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT Polyester seed‐oil derived polyols have been prepared and blended with conventional polyols for making polyurethane elastomers. Miscibility was complete for polypropylene oxide/polyethylene oxide and polytetramethylene oxide (PTMEG). Blends of polyester seed‐oil derived polyols with ...

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Synthesis of amino‐containing syndiotactic polystyrene as efficient polymer support for palladium nanoparticles

08.11.2014 | Zhenghai Shi, Fang Guo, Yang Li, Zhaomin Hou, Journal of Polymer Science Part A: Polymer Chemistry, 2014

Amino‐containing functionalized syndiotactic polystyrenes with high melting temperatures and temperature stability are synthesized by the direct polymerization of amino‐containing styrenic monomers in the presence of a half‐sandwich scandium catalyst system ...

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Synthesis and characterization of high nitrile content polyimides as dielectric films for electrical energy storage

30.10.2014 | David H. Wang, Brian A. Kurish, Imre Treufeld, Lei Zhu, Loon‐Seng Tan, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT Three new isomeric diamines containing three, oxy‐linked benzonitriles (3BCN), one of which is asymmetric (meta, para, or m, p), are synthesized in a 3‐step sequence. Polycondensation of these diamines and four common dianhydrides (6FDA, OPDA, BTDA, and PMDA) in N,N‐dimethylacetamide ...

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ROMP synthesis of novel thermo‐, pH‐, and salt‐responsive (co)polymers containing the morpholino functional group

21.10.2014 | Johannes A. Hensbergen, Sylvia Ganda, Peter J. Roth, Robert P. Burford, Andrew B. Lowe, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT We report the ring‐opening metathesis polymerization (ROMP) synthesis of novel (co)polymers containing the multiresponsive morpholino functional group [(3aR,7aS)−2‐(2‐morpholinoethyl)−3a,4,7,7a‐tetrahydro‐1H−4,7‐epoxyisoindole‐1,3(2H)‐dione (M1)]. All (co)polymers were prepared with ...

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Using controlled radical polymerization to confirm the lower critical solution temperature of an N‐(alkoxyalkyl) acrylamide polymer in aqueous solution

21.10.2014 | Xeniya Savelyeva, Lucia Li, Milan Marić, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT N‐(3‐Methoxypropyl) acrylamide (MPAM) was polymerized by controlled radical polymerization (CRP) methods such as nitroxide‐mediated polymerization (NMP) and reversible addition–fragmentation chain‐transfer polymerization (RAFT). CRP was expected to yield well‐defined polymers with ...

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Dynamic covalent polypeptides showing tunable secondary structures and thermoresponsiveness

20.10.2014 | Jiatao Yan, Kun Liu, Xiuqiang Zhang, Wen Li, Afang Zhang, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT Lysine‐based polypeptides can be afforded with steerable secondary structures and tunable thermoresponsiveness through dynamic covalent OEGylation. These polypeptides were formed through dynamic imine linkage via reactions of amino moieties from poly(l‐lysine)s with aldehydes from ...

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Effect of N‐methyl amide linkage on hydrogen bonding behavior and water transport properties of partially N‐methylated random aromatic copolyamides

03.10.2014 | Motohiro Aiba, Takahiro Tokuyama, Hidetoshi Matsumoto, Hiroki Tomioka, Tomoya Higashihara, Mitsuru Ueda, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT The synthesis, conformational preferences, hydrogen bonding behaviors, and membrane properties of new partially N‐methylated random aromatic copolyamides were reported. These copolyamides were prepared by the low temperature polycondensations of isophthaloyl chloride with ...

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Poly(ionic liquid)s derived from 3‐octyl‐1‐vinylimidazolium bromide and N‐isopropylacrylamide with tunable properties

03.10.2014 | Javier Illescas, Mariano Casu, Valeria Alzari, Daniele Nuvoli, Mariano Andrea Scorciapino, Roberta Sanna, Vanna Sann ..., Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT A new series of linear and crosslinked copolymers, obtained from 3‐octyl‐1‐vinylimidazolium bromide (VImBr) and N‐isopropylacrylamide (NIPAAm), were prepared by radical polymerization. Namely, VImBr was synthesized from 1‐bromooctane and an ionic liquid such as 1‐vinylimidazole. ...

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Living cationic polymerization of vinylnaphthalene derivatives

02.09.2013 | Yu Shinke, Arihiro Kanazawa, Shokyoku Kanaoka, Sadahito Aoshima, Journal of Polymer Science Part A: Polymer Chemistry, 2013

ABSTRACT The living cationic polymerization of 6‐tert‐butoxy‐2‐vinylnaphthalene (tBOVN), a vinylnaphthalene derivative with an electron‐donating group, was achieved with a TiCl4/SnCl4 combined initiating system in the presence of ethyl acetate as an added base at –30 °C. The absence of side ...

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ATNRC/SET‐NRC synthesis of graphene/polyisobutylene nanocomposites

28.08.2013 | Zhanzhan Liu, Yongjun Li, Yang Yang, Yongsheng Li, Xiaoyu Huang, Journal of Polymer Science Part A: Polymer Chemistry, 2013

ABSTRACT Two polyisobutylene‐grafted graphene nanocomposites were prepared by CuBr‐catalyzed atom transfer nitroxide radical coupling (ATNRC) and Cu‐catalyzed single electron transfer‐nitroxide radical coupling (SET‐NRC) chemistry under mild conditions, respectively, through the grafting‐onto ...

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