[1]刘剑洪,李伦军. 聚氨酯预聚物合成反应动力学研究(I)[J].深圳大学学报理工版,2003,20(4):14-20.
 LIU Jian-hong and LI Lun-jun.Studies on the Reaction Kinetics of NCO/OH in Preparing Polyurethane Prepolymer (I)[J].Journal of Shenzhen University Science and Engineering,2003,20(4):14-20.
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 聚氨酯预聚物合成反应动力学研究(I)()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第20卷
期数:
2003年4期
页码:
14-20
栏目:
土木建筑工程
出版日期:
2003-10-30

文章信息/Info

Title:
Studies on the Reaction Kinetics of NCO/OH in Preparing Polyurethane Prepolymer (I)
文章编号:
1000-2618(2003)04-0014-07
作者:
刘剑洪李伦军
深圳大学师范学院,深圳 518060
Author(s):
LIU Jian-hong and LI Lun-jun
Normal College Shenzhen University, Shenzhen 518060, P. R. China
关键词:
聚氨酯反应动力学支化核磁共振
Keywords:
polyurethane reaction kinetics branch 13C NMR
分类号:
O 633.4
文献标志码:
A
摘要:
提出一种新的测试聚氨酯预聚物合成反应过程中氨酯化反应和支化反应的动力学参数的理论模型. 通过化学定量分析4,4’一二苯基甲烷二异氰酸脂 (MDI) 与聚四甲撑醚二醇 (PTMG) 反应体系中的-NCO和-OH的浓度,分别获得该体系氨脂化反应和支化反应速率常数的Arrhenius表达式:k1=27.17exp(-19.79/RT),k2=5.886exp(-22.86/RT).在此基础上得到了支化速率Q与反应温度T、羟基转化率γ的关系:Q=0.2166exp(-370.0/T)γ/(1-γ).该结果与13C NMR所测结果相吻合.
Abstract:
A new theoretical model to study the reaction kinetics of NCO and OH in preparing polyurethane prepolymer is proposed. The Arrhenius equations of urethane and branch reactions are obtained respectively: k1=27.17exp(-19.79/RT),k2=5.886exp(-22.86/RT). The relationship between branch probability Q and reaction temperature T and OH-group shift ratio γ is derived: Q=0.2166exp(-370.0/T)γ/(1-γ). These results can be verified with 13C NMR.

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更新日期/Last Update: 2015-11-13