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366 Aktuelle Fachpublikationen zum Thema temperature

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Investigation of Mizoroki‐Heck coupling polymerization as a catalyst‐transfer condensation polymerization for synthesis of poly(p‐phenylenevinylene)

02.12.2014 | Masataka Nojima, Ryosuke Saito, Yoshihiro Ohta, Tsutomu Yokozawa, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT Mizoroki‐Heck coupling polymerization of 1,4‐bis[(2‐ethylhexyl)oxy]‐2‐iodo‐5‐vinylbenzene (1) and its bromo counterpart 2 with a Pd initiator for the synthesis of poly(phenylenevinylene) (PPV) was investigated to see whether the polymerization proceeds in a chain‐growth polymerization ...

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Synthesis of biodegradable thermoplastic elastomers from ε‐caprolactone and lactide

25.11.2014 | Yuushou Nakayama, Kazuki Aihara, Hitomi Yamanishi, Hiroshi Fukuoka, Ryo Tanaka, Zhengguo Cai, Takeshi Shiono, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT This article reports the synthesis and the properties of novel thermoplastic elastomers of A‐B‐A type triblock copolymer structure, where the hard segment A is poly(l‐lactide) (PLLA) and the soft segment B is poly(ε‐caprolactone‐stat‐d,l‐lactide) (P(CL‐stat‐DLLA)). The P(CL‐stat‐DLLA) ...

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Polymer grafting onto polyurethane backbone via Diels–Alder reaction

25.11.2014 | Soykan Agar, Hakan Durmaz, Ufuk Saim Gunay, Gurkan Hizal, Umit Tunca, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT The aliphatic polyurethane with pendant anthracene moieties (PU‐anthracene) was prepared from polycondensation of anthracen‐9‐yl methyl 3‐hydroxy‐2‐(hydroxymethyl)‐2‐methylpropanoate (anthracene diol), 1 with hexamethylenediisocyanate in the presence of dibutyltindilaurate in CH2Cl2 ...

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Novel heterocyclic poly(pyridine‐imide)s with unsymmetric carbazole substituent and noncoplanar structure: High thermal, mechanical and optical transparency, electrochemical, and electrochromic properties

21.11.2014 | Ying‐Chi Huang, Kun‐Li Wang, Wei‐Yi Lee, Yi‐An Liao, Der‐Jang Liaw, Kueir‐Rarn Lee, Juin‐Yih Lai, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT A diamine containing heterocyclic pyridine and unsymmetrical carbazole substituents, 4‐(9‐ethyl‐3‐carbazole)‐2,6‐bis(4‐aminophenyl)pyridine (CBAPP), was prepared for use in the synthesis of poly(pyridine‐imide)s PI‐1–8 by direct polycondensation with dianhydrides in ...

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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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