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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (06): 605-609.    下一篇

研究论文

二苯甲烷二异氰酸酯(MDI)聚合反应动力学研究

张琴花1,2，李会泉*,1，柳海涛1   

  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 E-mail:hqli@home.ipe.ac.cn
  • 基金资助:

    国家科技支撑项目;中国科学院知识创新重要方向性项目

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

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被引次数

11

采用TG-DSC-DTG技术研究了二苯甲烷二异氰酸酯(MDI)在流动高纯氮气中的聚合反应动力学. 利用Flynn-Wall-Ozawa法进行了非等温动力学计算, 得到了MDI聚合反应的动力学参数, 通过Satava-Sestak法、Coats-Redfern法对不同机理模型进行选取, 确定了MDI聚合反应的机理为随机成核和随后生长模型, 机理函数为 . 由以上三种方法计算结果表明: MDI聚合反应的表观活化能E＝58.42 kJ•mol－1, 指前因子A＝ 5006 min－1, 动力学方程为: [－ln(1－α)]1/2＝5006exp(-58.42*1000/8.314T)t.

关键词: 二苯甲烷二异氰酸酯, 聚合, 动力学, 机理

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