Silica reinforcement of epoxidized natural rubber by the sol-gel method

被引:37
作者
Hashim, AS [1 ]
Kawabata, N [1 ]
Kohjiya, S [1 ]
机构
[1] KYOTO UNIV,CHEM RES INST,UJI,KYOTO 611,JAPAN
关键词
sol-gel process; silica reinforcement; epoxidized natural rubber;
D O I
10.1007/BF00487018
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The sol-gel technique was employed to prepare silica-reinforced vulcanizates using tetraethylorthosilicate (TEOS) and epoxidized natural rubber (ENR). The rubber was first precured with 3-aminopropyltriethoxysilane (APS) by heat pressing at 180 degrees C for a range of cure time. The resultant rubber sheets or vulcanizates were swelled in TEOS, and subsequently subjected to a sol-gel reaction in butylamine aqueous solution. Hydrolysis and condensation of the TEOS resulted in the formation of silica particles in the rubber network yielding silica-contained vulcanizates. Silica content as high as 28% and TEOS-to-silica conversion of over 60% were observed. When prepared under certain reaction conditions, the sol-gel vulcanizates obtained were more rigid and stronger than a typical sulfur-cured ENR vulcanizate that contained comparable amount of silica. Comparative stress-strain and dynamic mechanical property analysis suggest that chemicals bond are formed between the silica particles and the rubber network in the ENR-APS-sol-gel vulcanizate. Thus, the ''in situ'' silica reinforcement of ENR was successfully established.
引用
收藏
页码:211 / 218
页数:8
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