Ion-exchange materials
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United States of America Patent
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app pub date -
Nov 21, 2006
filing date -
Mar 22, 2000
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Abstract
An ion-exchange material, for example a polymer electrolyte membrane or gas diffusion electrode comprises a semi-crystalline copolymer comprising: a first unit which includes an ion-exchange site; a second crystalline unit; and a third unit which is amorphous. The third unit is used to disrupt the crystallinity of the copolymer thereby to increase its solubility in solvents. The material described may be used in fuel cells.
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