Polar three-arm star block copolymer thermoplastic elastomers based on polyacrylonitrile

被引：59

作者：

Dufour, Bruno ^{[2
]}

Tang, Chuanbing ^{[2
]}

Koynov, Kaloian ^{[1
]}

Zhang, Ying ^{[1
]}

Pakula, Tadeusz ^{[1
]}

Matyjaszewski, Krzysztof ^{[2
]}

机构：

[1] Max Planck Inst Polymer Res, D-55021 Mainz, Germany

[2] Carnegie Mellon Univ, Ctr Macromol Engn, Dept Chem, Pittsburgh, PA 15213 USA

来源：

MACROMOLECULES | 2008年 / 41卷 / 07期

关键词：

D O I：

10.1021/ma702561b

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A series of well-defined poly(n-butyl acrylate)-b-polyacrylonitrile (PBA-PAN) triarm star block copolymers have been synthesized by ATRP. The incorporation of very polar hard segment of PAN was made possible with the aid of the halogen-exchange technique. Phase-separated morphology of cylindrical PAN domains hexagonally arranged in the pBA matrix was observed by atomic force microscopy and small-angle X-ray scattering in ail studied materials. The mechanical and thermal properties of the PBA-PAN triarm star block copolymers have been thoroughly characterized, and their thermoplastic elastomer behavior was studied. it was found that these block copolymers retain a phase-separated morphology until temperatures of at least 250 degrees C. Furthermore, because of chemical cross-linking of the PAN segments that takes places at around 280 degrees C, the triarm star PBA-PANs preserve their elastomeric properties until temperatures of more than 300 degrees C.

引用

页码：2451 / 2458

页数：8

共 93 条

[1] A new approach to styrenic thermoplastic elastomers: Synthesis and characterization of crystalline styrene-butadiene-styrene triblock copolymers [J].