Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (06): 605-609.     Next Articles

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  1. (1中国科学院过程工程研究所绿色过程工程实验室 湿法冶金清洁生产技术国家工程实验室 北京 100190)
    (2中国科学院研究生院 北京 100049)
  • 投稿日期:2010-09-20 修回日期:2010-11-01 发布日期:2010-11-09
  • 通讯作者: 李会泉
  • 基金资助:


Study on Polymerization Kinetics of Methylene Diphenyl Diisocyanate

Zhang Qinhua1,2 Li Huiquan*,1 Liu Haitao1   

  1. (1 Key Laboratory of Green Process and Engineering, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190)
    (2 Graduate University of Chinese Academy of Sciences, Beijing 100049)
  • Received:2010-09-20 Revised:2010-11-01 Published:2010-11-09

The polymerization processes of methylene diphenyl diisocyanate (MDI) had been studied in flow atmosphere of high purity N2 using TG-DSC-DTG techniques. The kinetic parameters of the polymerization process were calculated through the Flynn-Wall-Ozawa method and the polymerization mechanism of MDI was also studied with the Satava-Sestak and Coats-Redfern methods. The results indicated that: the process calculated could be attributed to the mechanism of random nucleation and subsequently growth, with the mechanism function being . The activation energy and pre-exponential factor were E=58.42 kJ/mol and A=5006 min-1, the kinetic equation may be expressed as: [-ln(1-α)]1/2=5006exp(-58.42*1000/8.314T)t.

Key words: methylene diphenyl diisocyanate, polymerization, kinetics, mechanism