• 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 >Solid-State Characterization and the Thermal Properties of Stereoregular Ply(Vinyl Chloride) Prepared by Urea Clathrate Polymerization
【24h】

Solid-State Characterization and the Thermal Properties of Stereoregular Ply(Vinyl Chloride) Prepared by Urea Clathrate Polymerization

机译：尿素包合物聚合制备的立体特征和立体性质的聚氯乙烯。

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 solid-state characterization of highly stereoregular poly(vinyl chloride) (PVC) prepared by urea clathrate polymerization was carried out by using various instrumental analyses.The structural differences of PVC appeared most remarkably in solubility to organic solvents,IR,WAXD,and solid-state ~(13)C-NMR spectra.The value of the glass transition temperature (T_g) was about 90 deg C,not as high as expected,although its detection was quite difficult.The thermal stability was poor,as evidenced by the easy discoloration of this polymer by heat treatment,which was related to the absence of a termination reaction.Dynamic ESR spectra in the solid state clearly indicate that the radical fromation occurs at such a low temperature as 160 deg C in the initial degradation stage.The degradation characteristics of urea clathrate PVC were critically discussed.
机译：通过各种仪器分析对尿素包合物聚合制备的高度立体规整的聚氯乙烯（PVC）进行了固态表征。PVC的结构差异在对有机溶剂，IR，WAXD和固体的溶解度方面表现得最为明显。态〜（13）C-NMR光谱。玻璃化转变温度（T_g）约为90℃，不及预期的高，尽管它的检测非常困难。固态聚合物容易通过热处理而变色，这与不存在终止反应有关。固态的ESR动态光谱清楚地表明，自由基降解是在初始降解阶段于160摄氏度这样的低温下发生的。严格讨论了尿素包合物聚氯乙烯的降解特性。

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