...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polimery >Thermal aging of hydrogenated nitrile rubber - loss of additives and its influence on elasticity maintenance
【24h】

Thermal aging of hydrogenated nitrile rubber - loss of additives and its influence on elasticity maintenance

机译：氢化丁腈橡胶的热老化 - 添加剂丧失及其对弹性维持的影响

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

The thermal aging of hydrogenated nitrile rubber (HNBR) at elevated temperatures 125 and 150 degrees C was investigated. The changes of chemical structures, including functional groups and crosslinking density, and the changes of mechanical properties, including recovery from bending (RFB), tensile strength, elongation at break and Young's modulus, were determined. In addition, the loss of additives was analyzed by pyrolysis gas chromatography-mass spectrometry (Py-GC/MS). The aging procedure of HNBR exhibited two stages: loss of additives along with the deterioration of elasticity; obvious oxidation and extra crosslinking with further hardening and embrittlement. The relationship between the deterioration of elasticity and the loss of plasticizers was established. It was demonstrated that the failure of HNBR happened long before obvious oxidation and crosslinking of the rubber chains, and the loss of additives, especially the loss of plasticizers, was the main reason for the failure. Therefore, the elasticity recovery of aged HNBR immersed in the plasticizer (n-propyl palmitate as a model) was carried out. This treatment was demonstrated to be effective before obvious oxidation and crosslinking of HNBR occurred during the thermal aging.
机译：研究了升高温度125和150℃的氢化丁腈橡胶（HNBR）的热老化。测定了化学结构的变化，包括官能团和交联密度，以及机械性能的变化，包括从弯曲（RFB）的恢复，抗拉强度，断裂和杨氏模量时的恢复。此外，通过热解气相色谱 - 质谱（Py-GC / MS）分析添加剂的丧失。 HNBR的老化程序表现出两级：添加剂的丧失以及弹性的劣化;具有进一步硬化和脆化的明显氧化和额外交联。建立了弹性劣化与增塑剂损失之间的关系。结果表明，HNBR的失败发生在明显的氧化和交联橡胶链之前，并且添加剂的丧失，尤其是增塑剂的丧失，是失败的主要原因。因此，进行了浸入增塑剂（正丙基棕榈酸酯作为模型）中的老化HNBR的弹性回收。在热老化期间，在热老化期间发生明显氧化和交联之前，证明了该处理是有效的。

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