Effect of steric constraints on the physico-electrochemical properties of sulfonated polyaromatic copolymers

被引：6

作者：

Peressin, Nicolas ^{[1
]}

Adamski, Michael ^{[1
]}

Holdcroft, Steven ^{[1
]}

机构：

[1] Simon Fraser Univ, Holdcroft Res Grp, Dept Chem, Burnaby, BC V5A 1S6, Canada

来源：

POLYMER INTERNATIONAL | 2021年 / 70卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

polyaromatic; steric constraints; proton exchange membrane; poly(phenylene); PROTON-EXCHANGE MEMBRANES; POLYMER ELECTROLYTE MEMBRANES; POLY(ARYLENE ETHER SULFONE); AROMATIC POLYMERS; CONDUCTING MEMBRANES; CROSS-LINKING; FUEL-CELLS; TEMPERATURE; MORPHOLOGY; POLYBENZIMIDAZOLE;

D O I：

10.1002/pi.6097

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The impact of incorporating additional steric restrictions into highly sterically encumbered sulfonated polyaromatic polymers was investigated. Copolymers possessing between 0 and 10% nonlinearorthoormetabiphenyl units in an otherwise linearparabiphenyl-containing sulfo-phenylated poly(phenylene) were synthesized in yields >80% and evaluated on the basis of their physical and electrochemical properties. When incorporated into sulfonated copolymers in <= 5 mol%,orthoandmetalinked biphenyl moieties reduced membrane swelling in water by up to 23 and 19 vol%, respectively, compared to strictlyparabiphenyl-linked copolymers. Despite this, copolymers possessing nonlinear, biphenyl-linked monomers displayed a decrease in proton conductivity and mechanical strength. This study reinforces the importance of considering restricted rotation, backbone flexibility, and chain entanglement in the design of polymers aimed at improving their physical and electrochemical properties. (c) 2020 Society of Industrial Chemistry

引用

页码：96 / 106

页数：11

共 60 条

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