摘要
研究了三元乙丙橡胶 /尼龙 (EPDM/ PA )体系原位生成微纤。以三元共聚尼龙替代部分炭黑 ,采用特殊工艺原位生成微纤 ,取得了良好的补强效果 ,与补强之前相比 ,12 1℃高温撕裂强度 ,常温撕裂强度及拉伸强度有大幅度提高 ,SEM照片显示 ,采用特殊工艺处理 ,可使分散相颗粒成纤 ,微纤在与硫化压力方向垂直的平面内无规取向。力学性能测试表明 ,取向的微纤复合材料 (沿微纤纵向的扯断伸长率大于沿横向的扯断伸长率 ,这一规律 )不同于取向的短纤维复合材料的规律 。
To prepare rubber compound with excellent properties, such as tensile strength, tear strength, hot tear strength and striking heat resistance property, a study was made on micro fiber of EPDM/PA. It was the first time to find that after some parts of carbon black were replaced by ternary nylon copolymer(nylon6/66/1010=20/10/70), mechanical properties of this compound vulcanized by peroxide, especially hot tear could be improved magnificently, while the composite keeping striking heat resistance property. SEM shows that disperse particles could be changed into micro fibers through some special treatment. Micro fibers are disorderly oriented in one plane which is vertical to the direction of vulcanization's tension. Only a few micro fibers become irregular through vulcanizing. Physical test reveals that elongations at break along the lengthways direction are larger than elongations at break along the vertical direction, which is contradictionary to the law of short fiber rubber composite. The reason for it was explained.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2001年第2期4-8,共5页
Acta Materiae Compositae Sinica
基金
国家九五攻关项目!(95 -HG-8)
