| 异戊二烯含量对硫黄硫化丁基橡胶硫化特性的影响 |
| Effect of isoprene content on the cure characteristics of sulfur-cured butyl rubber |
| 投稿时间：2014-09-02 修订日期：2014-09-02 |
| DOI： |
| 中文关键词: 丁基橡胶 硫黄 交联密度 硫化特性 硫化动力学 |
| 英文关键词: Butyl rubber Sulfur Cross-link density Cure characteristic Cure kinetic |
| 基金项目:德国Lanxess化学有限公司与青岛科技大学橡塑材料与工程教育部重点实验室合作项目(20012LSQ0116) |
|
| 摘要点击次数: 1927 |
| 全文下载次数: 492 |
| 中文摘要: |
| 本文主要通过无转子硫化仪研究异戊二烯含量对硫黄促进剂体系硫化丁基橡胶硫化特性及硫化动力学的影响。研究表明,在实验范围内,Ghoreishy动力学方程能较好地描述丁基橡胶硫磺硫化的行为。在相同硫化温度下,随着异戊二烯单元含量的增多,焦烧时间、正硫化时间逐渐缩短,交联密度明显增加,高温抗硫化返原性增强。随着硫黄用量的增多,丁基橡胶硫化胶的交联密度随硫黄用量呈线性增加,高异戊二烯含量的丁基橡胶硫黄硫化效率大幅度提高,反应级数增大,硫化活化能Ea明显降低,但异戊二烯含量从5.1mol.%增加到7mol.%时,硫黄硫化效率并未出现明显增加,Ea基本不变。 |
| 英文摘要: |
| The effect of isoprene content on the cure characteristics and cure kinetics of butyl rubber was investigated by isothermal moving die rheometer (MDR). The results indicated that, Ghoreishy’s equation showed a very good agreement with experimental data, which could be used to describe the cure behavior of accelerated sulfur vulcanization of butyl rubber. At the fixed curing temperature, decreases in the optimum cure time and in the scorch time and an obvious improvement in cross-link density were found when the isoprene content increased. The more isoprene content, the better reversion resistance at the high temperature. The cross-link densities of IIR vulcanizates increased linearly with the sulfur content. The high isoprene concentration was beneficial for the improvement of curing efficiency of sulfur, which also yielded the increase of reaction order and the obvious decrease in activation energy. But when isoprene content increased from 5.1mol.% to 7 mol.%, the curing efficiency of sulfur didn’t increase markedly, and the activation energy of vulcanization reaction nearly kept constant. |
|
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
