文献类型：期刊文献

中文题名：聚氨酯预聚体合成动力学研究

英文题名：Reaction kinetics of synthesis process of polyurethane prepolymers

作者：闫录[1];胡冬冬[1];刘涛[1];许志美[1];赵玲[1]

机构：[1]华东理工大学化工学院上海市多相结构材料化学工程重点实验室,上海200237

年份：2018

卷号：47

期号：11

起止页码：1165

中文期刊名：石油化工

外文期刊名：Petrochemical Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

基金：国家自然科学基金项目(21676092)

语种：中文

中文关键词：聚氨酯预聚物;反应动力学;氨酯化反应;固化反应;交联密度

外文关键词：polyurethane prepolymer;reaction kinetics;urethanation;curing reaction;crosslinking density

摘要：以多苯基多亚甲基多异氰酸酯和聚丙二醇为原料合成了异氰基封端的聚氨酯预聚体,在60～140℃温度范围内考察了反应温度对聚氨酯预聚体相对分子质量及交联密度的影响,并采用化学分析法和FTIR法研究了反应的动力学。实验结果表明,聚氨酯预聚体的相对分子质量和交联密度随反应温度的升高而增大,温度是交联反应发生的主要控制因素,在60～80℃范围内氨酯化反应的反应级数接近2级,反应活化能为23.58 kJ/mol;在100～140℃温度范围内,温度越高,固化反应程度越高,固化反应动力学符合n级模型,反应级数为1.41～1.62,反应活化能为53.81 kJ/mol。
A series of isocyanate-terminated polyurethane prepolymers were synthesized by using polyaryl polymethylene isocyanate and polypropylene glycol as the raw materials.The effects of reaction temperature on the molecular weight and crosslinking density of polyurethane prepolymer were investigated at temperature ranging from60℃to140℃.The reaction kinetics of the synthesis of polyurethane prepolymers was also investigated by chemical analysis and FTIR methods from60℃to140℃.The results showed that the crosslinking reaction was dominated by reaction temperature and the molecular weight and crosslinking density of polyurethane prepolymer increased with increasing temperature.The urethanation was a second order reaction and its activation energy was23.58kJ/mol from60℃to80℃.The increasing temperature would result in an increase of the curing degree from100℃to140℃.In addition,the n-th model kinetic model was applied to present the cure kinetics,which had a reaction order of1.41-1.62with an activation energy of53.81kJ/mol.