• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Thermal degradation kinetics of polyesters containing mesogenic aromatic diols
【24h】

Thermal degradation kinetics of polyesters containing mesogenic aromatic diols

机译：含介晶芳族二醇的聚酯的热降解动力学

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

A series of polyesters were synthesized by reacting structurally differing aromatic diols with either saturated (flexible) or unsaturated (rigid) dicarboxylic acid halide by a stirred interfacial polycondensation technique. Thermal degradation kinetics of these polyesters were investigated by applying Coats-Redfern and Horowitz-Metzger nonisothermal procedures. The dynamic thermogravimetry experiments were conducted in nitrogen to obtain differential thermogravimetric plots. Thermal stability of these polyesters was discussed on the basis of semiquantitative methods such as differential procedural decomposition temperature, integral procedural decomposition temperature, and fraction decomposition temperature (e.g., 10 % DT). Degradation proceeded in multiple stages. The thermal degradation patterns and activation energies in these stages were discussed in relation to central bridging moieties of aromatic diol. The activation energies of these polyesters were found to be in the range of 100 to 200 kJ/mol. The effect of spacer type on activation energy was also reported. (c) 2005 Wiley Periodicals, Inc.
机译：通过搅拌界面缩聚技术，将结构不同的芳族二醇与饱和（柔性）或不饱和（刚性）二羧酸卤化物反应，合成了一系列聚酯。通过应用Coats-Redfern和Horowitz-Metzger非等温程序研究了这些聚酯的热降解动力学。在氮气中进行动态热重分析实验，以获得差分热重图。这些聚酯的热稳定性是根据半定量方法，例如差分程序分解温度，积分程序分解温度和馏分分解温度（例如10％DT）来讨论的。降解过程分为多个阶段。关于芳族二醇的中心桥联部分，讨论了这些阶段中的热降解模式和活化能。发现这些聚酯的活化能在100至200kJ / mol的范围内。还报道了间隔物类型对活化能的影响。 （c）2005年Wiley Periodicals，Inc.

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