...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polymers for advanced technologies >Analysis of the thermogenesis mechanism of natural rubber under high speed strain
【24h】

Analysis of the thermogenesis mechanism of natural rubber under high speed strain

机译：高速应变下天然橡胶的热生成机理分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This work highlights the relationship of crosslink density, entanglement points and various sulfide crosslinks with the thermogenesis properties of natural rubber (NR). The impact of cross-link and entanglement on thermogenesis properties was evaluated by heat build-up test, swelling behavior, statistical thermodynamic calculation, and classic viscoelastic theory. It was found that cross-link and entanglement points have "pinning" effect to the rubber chain, thus remarkably restricting the motion of the rubber chain and reducing thermogenesis. Besides, the effects of various sulfide crosslinks and cross-link length on thermogenesis were compared and discussed varying the sulfur vulcanization system. It was found that the semi-effective vulcanization system using N-cyclohexyl-2-benzothiazolesulfenamide (CZ) and 2-Mercaptobenzothiazole (M) has the lowest thermogenesis (bottom temperature rise is 7.5 degrees C, middle is 18.7 degrees C), which on account of combined short crosslink length with high rigid rubber chain (crosslink network dominated by mono- and disulfides). As a result, the deformation degree of the rubber chain during curl up-extension and the thermogenesis are further reduced. Finally, a combination of natural film coagulation and semi-effective vulcanization system was used to prepare a low thermogenesis NR, in which bottom and middle temperature rise were only 5.0 degrees C and 14.1 degrees C, respectively.
机译：该工作突出了交联密度，缠结点和各种硫化物交联的关系与天然橡胶（NR）的热生成特性。通过热积聚试验，膨胀行为，统计热力学计算和经典的粘弹性理论，评估交联和缠结对热生成性能的影响。发现交叉链路和缠结点对橡胶链具有“钉扎”效应，从而显着限制橡胶链的运动和减少热生成。此外，比较了各种硫化物交联和交联长度对热生成的影响，并讨论了硫硫化系统。发现使用N-Cyclohexyl-2-苯并噻唑苯胺酰胺（CZ）和2-巯基噻唑（M）的半效硫化系统具有最低的热生成（底部温度升高为7.5℃，中间为18.7℃）用高刚性橡胶链组合短交联长度（单硫化物和二硫化物支配的交联网络）。结果，进一步减少了卷曲期间橡胶链和热生成期间的变形程度。最后，使用天然膜凝固和半效硫化体系的组合制备低热生成NR，其中底部和中温升高仅为5.0℃和14.1度C.

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号