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,121 ℃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,并对这一反常规律作出解释.
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.
参考文献
| [1] | 张立群. 短纤维补强技术在橡胶工业中的应用[J]. 橡胶工业,1995,42(3):169-174. |
| [2] | 山本新治. 强化橡胶组成物以及它的制造法[R]. 日本公开特许公报(日文),昭59-43041,1984. |
| [3] | 马军, 朱玉俊. EPDM共混改性研究概况[J]. 合成橡胶工业, 2000,23(3):85-91. |
| [4] | 马军, 朱玉俊. EPDM/PA增强共混的初步研究[J]. 合成橡胶工业, 1999,22(6):358-361. |
| [5] | 马军,朱玉俊.EPDM/PA高性能弹性体的增容机理[J].合成橡胶工业,2000,23(5):186-191. |
| [6] | 马军,朱玉俊.EPDM/PA高性能弹性体增容剂及共混工艺的研究[J].橡胶工业,2000,47(6):323-330. |
| [7] | 马军,朱玉俊.EPDM/PA高性能弹性体配合体系的研究[J].橡胶工业,2000,47(10):558-593. |
| [8] | 马军,朱玉俊.三元乙丙橡胶/尼龙高性能弹性体结构与性能的研究[J].高分子学报,2000,6:727-732. |
| [9] | Touchet, Paul. Rubber compound for tracked vehicle track pads[P].US patent:4 843 114, 1989-06-27. |
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