SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (6): 1052-1059.DOI: 10.1016/j.cjche.2014.12.002

• 材料与产品工程 • 上一篇    下一篇

UV enhanced gas–solid synthesis of chlorinated poly vinyl chloride characterized by a UV–Vis online analysis method

Qianli Yang, Wei Lu, Lin Bai, Binhang Yan, Yi Cheng   

  1. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • 收稿日期:2014-08-27 修回日期:2014-12-09 出版日期:2015-06-28 发布日期:2015-07-09
  • 通讯作者: Yi Cheng
  • 基金资助:

    Supported by the National Science and Technology Key Supporting Project (2013BAF08B05) and the National Natural Science Foundation of China (21176137).

UV enhanced gas–solid synthesis of chlorinated poly vinyl chloride characterized by a UV–Vis online analysis method

Qianli Yang, Wei Lu, Lin Bai, Binhang Yan, Yi Cheng   

  1. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2014-08-27 Revised:2014-12-09 Online:2015-06-28 Published:2015-07-09
  • Contact: Yi Cheng
  • Supported by:

    Supported by the National Science and Technology Key Supporting Project (2013BAF08B05) and the National Natural Science Foundation of China (21176137).

摘要: Dynamic characteristics of UV enhanced gas–solid PVC chlorination process were revealed by a UV–Vis spectral online analysis method. Experimental results showed an instantaneous increase of the chlorination rate as soon as UV lightwas affiliated, which demonstrated the intensified effect of UV radiation on PVC chlorination directly. Different affiliationmethods of UV light were then studied, proving that continuous UV radiation could enhance the chlorination process significantly while intermittent UV radiation was able to initiate the chlorination reaction once it was conducted. Besides, experiments were carried out to study the influences of parameters on the chlorination process such as UV wavelength, chlorination temperature, partial pressure of chlorine gas and PVC raw materials. Among all the parameters, chlorination temperature and partial pressure of chlorine gas were testified as two key factors to determine the chlorination performance. Thermal analysis of CPVC products showed that their corresponding properties such as the glass transition temperature (Tg) and the homogeneity of chlorine distribution in polymer phase were improved with the increase of chlorine content.

关键词: Polymer, Photochemistry, UV&ndash, Vis online analysis, Dynamic characteristics, Chlorinated poly vinyl chloride

Abstract: Dynamic characteristics of UV enhanced gas-solid PVC chlorination process were revealed by a UV-Vis spectral online analysis method. Experimental results showed an instantaneous increase of the chlorination rate as soon as UV lightwas affiliated, which demonstrated the intensified effect of UV radiation on PVC chlorination directly. Different affiliationmethods of UV light were then studied, proving that continuous UV radiation could enhance the chlorination process significantly while intermittent UV radiation was able to initiate the chlorination reaction once it was conducted. Besides, experiments were carried out to study the influences of parameters on the chlorination process such as UV wavelength, chlorination temperature, partial pressure of chlorine gas and PVC raw materials. Among all the parameters, chlorination temperature and partial pressure of chlorine gas were testified as two key factors to determine the chlorination performance. Thermal analysis of CPVC products showed that their corresponding properties such as the glass transition temperature (Tg) and the homogeneity of chlorine distribution in polymer phase were improved with the increase of chlorine content.

Key words: Polymer, Photochemistry, UV&ndash, Vis online analysis, Dynamic characteristics, Chlorinated poly vinyl chloride