Synthesis and Structure-Conductivity Relationship of Polystyrene-block-Poly(vinyl benzyl trimethylammonium) for Alkaline Anion Exchange Membrane Fuel Cells

被引：78

作者：

Tsai, Tsung-Han ^{[1
]}

Maes, Ashley M. ^{[2
]}

Vandiver, Melissa A. ^{[2
]}

Versek, Craig ^{[3
]}

Seifert, Soenke ^{[4
]}

Tuominen, Mark ^{[3
]}

Liberatore, Matthew W. ^{[2
]}

Herring, Andrew M. ^{[2
]}

Coughlin, E. Bryan ^{[1
]}

机构：

[1] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA

[2] Colorado Sch Mines, Dept Chem & Biol Engn, Golden, CO 80401 USA

[3] Univ Massachusetts, Dept Phys, Hasbrouck Lab 411, Amherst, MA 01003 USA

[4] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA

来源：

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 2013年 / 51卷 / 24期

基金：

美国国家科学基金会;

关键词：

amphiphilic block copolymers; anion exchange membrane fuel cell; atom transfer radical polymerization (ATRP); phase separation; polymeric electrolyte membranes; polystyrene; poly(vinyl benzyl trimethylammonium); structure; conductivity relationship; VINYLBENZYL CHLORIDE; TRANSPORT-PROPERTIES; ORDER-DISORDER; HYDROXIDE; COPOLYMER; PERFORMANCE; METHANOL; IONOMER; ELECTROOXIDATION; METHACRYLATE;

D O I：

10.1002/polb.23170

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Block copolymers of polystyrene-b-poly(vinyl benzyl trimethylammonium tetrafluoroborate) (PS-b-[PVBTMA][BF4]) were synthesized by sequential monomer addition using atom transfer radical polymerization. Membranes of the block copolymers were prepared by drop casting from dimethylformamide. Initial evaluation of the microphase separation in these PS-b-[PVBTMA][BF4] materials via SAXS revealed the formation of spherical, cylindrical, and lamellar morphologies. Block copolymers of polystyrene-b-poly(vinyl benzyl trimethylammonium hydroxide) (PS-b-[PVBTMA][OH]) were prepared as polymeric alkaline anion exchange membranes materials by ion exchange from PS-b-[PVBTMA][BF4] with hydroxide in order to investigate the relationship between morphology and ionic conductivity. Studies of humidity [relative humidity (RH)]-dependent conductivity at 80 degrees C showed that the conductivity increases with increasing humidity. Moreover, the investigation of the temperature-dependent conductivity at RH = 50, 70, and 90% showed a significant effect of grain boundaries in the membranes against the formation of continuous conductive channels, which is an important requirement for achieving high ion conductivity. (c) 2012 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2013, 51, 1751-1760, 2013

引用

页码：1751 / 1760

页数：10

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