| MDI与PPG预聚反应动力学 |
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| 引用本文： | 闫泽群,王洪武,黄岐善,付志峰,华卫琦.MDI与PPG预聚反应动力学[J].高分子材料科学与工程,2009(12). |
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| 作者姓名： | 闫泽群 王洪武 黄岐善 付志峰 华卫琦 |
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| 作者单位： | 北京化工大学材料科学与工程学院;烟台万华聚氨酯股份有限公司; |
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| 摘 要： | 二苯基甲烷二异氰酸酯与聚醚多元醇反应是合成二苯基甲烷二异氰酸酯(MDI)型预聚体的重要反应。文中采用ReactTM4000在线红外分析系统,以聚丙二醇(PPG)主链中亚甲基伸缩振动峰作为内标,监测不同异构体组成的MDI单体与PPG聚醚反应过程中异氰酸酯官能团的红外吸收峰变化,系统研究了MDI与PPG的预聚反应动力学过程,得到MDI中4位异氰酸酯与2位异氰酸酯反应速率常数分别为k=2.833×104exp(-47862/RT)(L/mol.min),k=6.725×109exp(-88078/RT)(L/mol.min)。
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| 关 键 词： | 二苯基甲烷二异氰酸酯 聚醚 动力学常数 在线红外 阿仑尼乌斯方程 |
Prepolymer Reaction Kinetics of MDI and PPG |
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| YAN Ze-qun,WANG Hong-wu,HUANG Qi-shan,FU Zhi-feng,HUA Wei-qi.Prepolymer Reaction Kinetics of MDI and PPG[J].Polymer Materials Science & Engineering,2009(12). |
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| Authors: | YAN Ze-qun WANG Hong-wu HUANG Qi-shan FU Zhi-feng HUA Wei-qi |
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| Affiliation: | YAN Ze-qun1,WANG Hong-wu2,HUANG Qi-shan2,FU Zhi-feng1,HUA Wei-qi2 (1.College of Material Science & Engineering,Beijing University of Chemical Technology,Beijing 100029,China,2.Yantai Wanhua Polyurethanes Co.,Ltd.,Yantai 264002,China) |
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| Abstract: | The reaction kinetics between diphenyl-methane-diisocyanate(MDI) and polypropylene glycol(PPG) was investigated by IR online monitor system,IR ReactTM 4000.The IR absorption peak development of isocyanate and urethane in the reaction process of MDI monomer with different isomers and PPG polyether were studied.The reaction kinetics of the isocyanate in the different space position of MDI molecular structure with the hydroxy group of PPG polyether was analysised systematically by these IR spectrum figure and ... |
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| Keywords: | diphenyl-methane-diisocyanate polyether kinetics constant online IRTM Arrhenius function |
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