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Study of radiation-induced graft copolymerization of vinyl acetate onto ethylene-co-propylene rubber

✍ Scribed by Yue-E Fang; Xiao Bing Lu; Shan Zhi Wang; Xia Zhao; Fang Fang

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
325 KB
Volume
62
Category
Article
ISSN
0021-8995

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✦ Synopsis

The radiation-induced graft copolymerization of vinyl acetate (VAc) onto ethylene-co-propylene rubber (EPR) has been studied in methanol with radiation of cobalt-60. The effects of irradiation dose, dose rate, concentration of monomer, Cu'+ concentration, and temperature on the degree of grafting were investigated. The dependence of the initial grafting rate on dose rate, monome, and Cu++ concentration were found to be 1.0, 1.95, and 0.5 order, respectively. The apparent activation energy was calculated to be 49 kJ/mol. Mechanical properties of the grafted polymer were investigated as a function of the grafting percentage. The tensile strength increases and elongation of break decreases with the increase of the degree of grafting in the region of low grafting percentage ( ~1 0 % ) .

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