Considerations of macromolecular structure in the design of proton conducting polymer membranes: Graft versus diblock polyelectrolytes

被引：210

作者：

Tsang, Emily M. W. ^{[1
]}

Zhang, Zhaobin ^{[1
]}

Shi, Zhiqing ^{[2
]}

Soboleva, Tatyana ^{[1
]}

Holdcroft, Steven ^{[1
,2
]}

机构：

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

[2] Natl Res Council Canada, Inst Fuel Cell Innovat, Vancouver, BC V6T 1W5, Canada

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2007年 / 129卷 / 49期

关键词：

D O I：

10.1021/ja074765j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Model fluorous-ionic copolymer systems were synthesized and studied to investigate the role of polymer architecture on morphology and properties of solid polymer electrolytes. Two types of compositionally similar but architecturally distinct copolymers were investigated: P(VDF-co -CTFE)-g -S PS graft copolymers, comprising a hydrophobic fluorous backbone and sulfonated styrene side chains, and P(VDF-co -HFP)-b -S PS diblock copolymers, comprising a hydrophobic fluorous segment linearly connected to a sulfonated styrenic segment. The macromolecular structure plays an important role in determining membrane morphology. Graft membranes possess a small ionic cluster morphology while diblock membranes possess a lamellar-like morphology. These morphological differences affect the threshold of ionic percolation, water sorption, proton mobility and concentration, proton conductivity, and anisotropy of ion conduction.

引用

页码：15106 / +

页数：3