MOISTURE CURE AND IN-SITU SILICA REINFORCEMENT OF EPOXIDIZED NATURAL-RUBBER

被引:55
作者
HASHIM, AS
KOHJIYA, S
IKEDA, Y
机构
[1] KYOTO UNIV,INST CHEM RES,UJI,KYOTO 611,JAPAN
[2] KYOTO INST TECHNOL,DEPT MAT SCI,KYOTO 606,JAPAN
关键词
EPOXIDIZED NATURAL RUBBER; MOISTURE CURE; SOL-GEL PROCESS; IN SITU SILICA REINFORCEMENT; TENSILE PROPERTIES;
D O I
10.1002/pi.1995.210380202
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Epoxidized natural rubber (ENR) was first precured with 3-aminopropyltriethoxysilane (APS) by the normal compression molding technique. The resultant sheet was further subjected to moisture cure, via hydrolysis and condensation reactions, by soaking it in water. The moisture-cured sample, when prepared under appropriate reaction conditions, demonstrated partial strain-induced crystallization behavior and moderate tensile strength, as opposed to typical peroxide-cured and sulfur-cured vulcanizates. The suitability of the ENR-APS precured sample for in-situ silica reinforcement by the sol-gel process, using tetraethyl orthosilicate (TEOS) as the silica precursor, was also demonstrated. Silica content as high as 36% by weight could be incorporated into the rubber, and TEOS-to-silica conversion of over 60% was observed Comparative analysis with a typical peroxide-cured sample that was subjected to the same sol-gel process indicates that the silica in the final ENR-APS sol-gel vulcanizate is chemically bound to the rubber network.
引用
收藏
页码:111 / 117
页数:7
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