Hyperbranched-linear poly(ether sulfone) blend films for proton exchange membranes

被引：27

作者：

Grunzinger, Stephen J. ^{[1
]}

Watanabe, Masatoshi ^{[1
]}

Fukagawa, Kiyotaka ^{[1
]}

Kikuchi, Ryohei ^{[1
]}

Tominaga, Yoichi ^{[1
]}

Hayakawa, Teruaki ^{[1
]}

Kakimoto, Masa-aki ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan

来源：

JOURNAL OF POWER SOURCES | 2008年 / 175卷 / 01期

关键词：

hyperbranched polymer; fuel cell; poly(ether sulfone); spinodal decomposition;

D O I：

10.1016/j.jpowsour.2007.09.020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Hyperbranched poly(ether sulfone) polymers having sulfonyl chloride end-groups is blended at up to 30 w% with linear poly(ether ether ether sulfone)s and a two-phase system is generated via spinodal decomposition upon drying from a DMAc solution. Conversion of the end-groups from sulfonyl chloride to sulfonic acid is accomplished using 16M H2SO4 that is also believed to introduce additional sulfonic acid groups at the interface of the linear polymer. The blend films before and after conversion to sulfonic acid have similar tensile strengths as films composed of solely linear polymer (yield stress >40 MPa and Young's modulus >3 GPa m). These films are designed to test the viability of hyperbranched polymers as fuel cell membranes. Proton conductivities of up to 0.03 S cm(-1) are observed at 80 C and 90% R.H indicating a good potential for use of hyperbranched polymers as a proton conduction material. (c) 2007 Published by Elsevier B.V.

引用

页码：120 / 126

页数：7

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