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Effect of carboxyl on vulcanization and mechanical properties of carboxylated acrylic rubber prepared by 60 Co‐γ‐ray‐induced polymerization
Author(s) -
Wang Weiwei,
Chang Zhenqi,
Wang Mozhen,
Zhang Zhicheng
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.24897
Subject(s) - itaconic acid , vulcanization , polymer chemistry , acrylic acid , gel permeation chromatography , polymerization , materials science , dispersity , emulsion polymerization , polymer , copolymer , natural rubber , chemical engineering , composite material , engineering
Acrylic acid carboxylated acrylic rubber (ACM) and itaconic acid carboxylated acrylic rubber were prepared by 60 Co‐γ‐ray‐induced emulsion copolymerization. The polymers were characterized using FTIR and 13 C NMR spectroscopies. The acid value was determined with nonaqueous titration method. The molecular weight and the polydispersity index of the polymers were measured using gel permeation chromatography. The influence of the cure‐site (carboxyl) on the vulcanization and mechanical properties of the ACM was researched by means of rheometric study, gel fraction analysis, mechanical property tests, and dynamic mechanical thermal analysis. The results show that the crosslink density of polymers increases with amounts of the carboxyl cure‐site. The itaconic acid carboxylated ACM has better cure characteristics and mechanical properties than the acrylic acid carboxylated ACM has. In addition, the comparison of ACM prepared by 60 Co‐γ‐ray‐induced polymerization with ACM prepared by chemical‐initiator‐induced polymerization has been investigated. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 5587–5594, 2006