• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Molecular chain model construction, thermostability, and thermo-oxidative degradation mechanism of poly(vinyl chloride)
【24h】

Molecular chain model construction, thermostability, and thermo-oxidative degradation mechanism of poly(vinyl chloride)

机译：聚（氯乙烯）的分子链模型结构，热稳定性和热氧化降解机制

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

Thermo-oxidative degradation of poly(vinyl chloride) (PVC) is inevitable during its processing. We focused on the relationship between the structure and properties of PVC, as well as on the thermal-oxidative degradation mechanism of PVC. Two models, the unsaturated and oxygen-containing structure models, were successfully constructed by pretreatment under different atmospheres. The thermal stability of treated PVC was determined by thermogravimetric analysis. An X-ray photoelectron spectroscopy (XPS) processing method was also used to analyze the type of functional groups that may be produced during thermal-oxidative degradation, whereas XPS and Fourier-transform infrared (FTIR) spectrometry were used to determine the trend in the content variation of functional groups of samples. The two structure models revealed that the thermal properties were greatly influenced by oxygen-containing groups compared with the unsaturated structures, and the position of oxygen molecule attack on the PVC main chain is not primarily located on the unsaturated structure or the a carbon atom of the unsaturated sides. XPS and FTIR results can possibly provide evidence for the thermo-oxidative degradation mechanism of PVC. Moreover, a carbonyl group was generated when the methylene or methine structure was attacked by an oxygen molecule, rendering the PVC resins unstable.
机译：在其加工过程中，聚（氯乙烯）（PVC）的热氧化降解是不可避免的。我们专注于PVC的结构和性质与PVC的热氧化降解机理之间的关系。通过不同的环境下的预处理成功地构建了两种型号，不饱和和含氧结构模型。通过热重分析确定处理过的PVC的热稳定性。 X射线光电子能谱（XPS）处理方法还用于分析可在热氧化降解期间产生的官能团的类型，而XPS和傅立叶变换红外（FTIR）光谱法用于确定趋势样品官能团的内容变异。两种结构模型显示，与不饱和结构相比，热性质受到含氧基团的大大影响，并且氧分子攻击对PVC主链的位置主要位于不饱和结构或碳原子上不饱和侧面。 XPS和FTIR结果可能为PVC的热氧化降解机制提供了证据。此外，当亚甲基或甲基结构受到氧分子的攻击时产生羰基，使PVC树脂不稳定。

著录项

  • 来源
    《RSC Advances》 |2016年第38期|共8页
  • 作者

    Liu Jia; Lv Yin; Luo Zhidong; Wang Heyun; Wei Zhong;

  • 作者单位

    Shihezi Univ Key Lab Green Proc Chem Engn Xinjiang Bingtuan Sch Chem &

    Chem Engn Shihezi Peoples R China;

    Shihezi Univ Key Lab Mat Oriented Chem Engn Xinjiang Uygur Aut Engn Res Ctr Mat Oriented Chem Engn Xinjiang Bing Sch Chem &

    Chem Engn Shihezi Peoples R China;

    Shihezi Univ Key Lab Green Proc Chem Engn Xinjiang Bingtuan Sch Chem &

    Chem Engn Shihezi Peoples R China;

    Shihezi Univ Key Lab Green Proc Chem Engn Xinjiang Bingtuan Sch Chem &

    Chem Engn Shihezi Peoples R China;

    Shihezi Univ Key Lab Green Proc Chem Engn Xinjiang Bingtuan Sch Chem &

    Chem Engn Shihezi Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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