Partially fluorinated copolymer based on trifluorostyrene and substituted vinyl compound and ionic conductive polymer membrane formed therefrom

摘要

A trifluorostyrene and substituted vinyl compound based partially fluorinated copolymer, an ionic conductive polymer membrane including the same, and a fuel cell adopting the ionic conductive polymer membrane are provided. The partially fluorinated copolymer has formula (1): CHEM where each of R1, R2 and R3 is F, H or CH3; X is a hydroxy group or a trifluoromethyl group; m is an integer greater than zero; n is an integer greater than zero; and p, q and r are zero or integers greater than zero. The copolymer having formula (1) includes trifluorostyrene units and substituted vinyl compound units, which may be partially crosslinked. Ionic conductive polymer membranes can be manufactured using the copolymer at low cost, with excellent mechanical properties. When a partially crosslinked copolymer is used, the degree of swelling of the resulting polymer membrane and fuel crossover can be reduced. The efficiency of fuel cells can be improved by adopting the ionic conductive polymer membrane.