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Cation exchange membranes by radiation-induced graft copolymerization of styrene onto PFA copolymer films. II. Charactarization of sulfonated graft copolymer membranes

Nasef, Mohamed Mahmoud and Saidi, Hamdani and Mohd Nor, Hussin and Ooi, Mun Foo (2000) Cation exchange membranes by radiation-induced graft copolymerization of styrene onto PFA copolymer films. II. Charactarization of sulfonated graft copolymer membranes. Journal of Applied Polymer Science, 76 . pp. 1-11.

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Abstract

PFA-g-polystyrene sulfonic acid membranes were prepared by simultaneous radiation-induced graft copolymerization of styrene onto poly(tetrafluoroethylene- co-perfluorovinyl ether) (PFA) film followed by sulfonation. The membrane physicochemical properties such as swelling behavior, ion exchange capacity, hydration number, and ionic conductivity were studied as a function of the degree of grafting. Thermal as well as chemical stability of the membranes was also investigated. The membrane properties were found to be mainly dependent upon the degree of grafting. The water uptake, ion exchange capacity, hydration number, and ionic conductivity of the membranes were increased, whereas the chemical stability decreased as the degree of grafting increased. The membranes showed reasonable physico-chemical properties compared to Nafion 117 membranes. However, their chemical stability has to be further improved to make them acceptable for practical use in electrochemical applications.

Item Type:Article
Uncontrolled Keywords:cation exchange membrane; radiation-induced graft copolymerization; PFA; styrene; properties
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:3717
Deposited By: Miss Sharifah Rafidah Wan Alwi
Deposited On:19 Jun 2007 09:38
Last Modified:01 Jun 2010 03:11

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