Thermally Cross-Linked Anion Exchange Membranes from Solvent Processable Isoprene Containing Ionomers

被引：63

作者：

Tsai, Tsung-Han ^{[1
]}

Ertem, S. Piril ^{[1
]}

Maes, Ashley M. ^{[2
]}

Seifert, Soenke ^{[3
]}

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

来源：

MACROMOLECULES | 2015年 / 48卷 / 03期

关键词：

ALKALINE FUEL-CELLS; POLYMERIZATION; TRANSPORT; MORPHOLOGY; LINKING; PERFORMANCE; HYDROXIDE; FILMS; ACID;

D O I：

10.1021/ma502362a

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Random copolymers of isoprene and 4-vinylbenzyl chloride (VBCl) with varying compositions were synthesized via nitroxide-mediated polymerization. Subsequent quaternization afforded solvent processable and cross-linkable ionomers with a wide range of ion exchange capacities (IECs). Solution cast membranes were thermally cross-linked to form anion exchange membranes. Cross-linking was achieved by taking advantage of the unsaturations on the polyisoprene backbone, without added cross-linkers. A strong correlation was found between water uptake and ion conductivity of the membranes: conductivities of the membranes with IECs beyond a critical value were found to be constant related to their high water absorption. Environmentally controlled small-angle X-ray scattering experiments revealed a correlation between the average distance between ionic clusters and the ion conductivity, indicating that a well-connected network of ion clusters is necessary for efficient ion conduction and high ion conductivity.

引用

页码：655 / 662

页数：8

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