文献类型：期刊文献

中文题名：聚氨酯快速(RIM)聚合的绝热反应动力学

英文题名：ADIABATIC REACTION KINETICS DURING FAST (RIM) POLYMERIZATION OF POLYURETHANE

作者：罗宁[1];王得宁[1];应圣康[1];钱夕元[2]

机构：[1]华东理工大学材料科学研究所,上海200237;[2]华东理工大学流变学研究室,上海200237

年份：1995

卷号：46

期号：6

起止页码：656

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;EI(收录号：1996193105189);Scopus;北大核心:【北大核心1992】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金重点研究项目

语种：中文

中文关键词：聚氨酯;本体聚合;反应动力学;反应注射成型;催化剂

外文关键词：polyurethane, bulk polymerization, kinetics, Reaction injection molding (RIM), catalyst

摘要：用环氧乙烷封端的聚环氧丙烷聚醚二元醇与4,4’-二苯基甲烷二异氰酸酯(MDI)或液化改性的MDI(L-MDI)进行快速本体聚合,比较了二月桂酸二丁基锡(DBTDL)、辛酸亚锡(SnOct)、硫醇锡(UL-29)以及相应的几种锡/胺体系在绝热条件下的催化活性.用非线性优化方法求取了反应动力学参数值.结果表明,在绝热条件下本体聚合的反应活化能为130～170kJ/mol,每当量NCO官能团的反应热为61～72kJ.催化剂的活性顺序为:SnOct>DBTDL>UL-29和BDTDL/DABCO(三乙烯二胺)>UL-29/DABCO>Snoct/DABCO.反应总级数为2级,催化剂种类的变化对反应总级数基本上无影响.
The fast (Reaction injection molding, RIM) polymerization was carried out by reacting ethylene oxide capped poly (propyl oxide) polyether diol (PPO) with 4,4'-diphenyl-methylene diisocynate (MDI) or liquefied MDI (L-MDI). Catalyst activity was compared for dibutyltin dilaurate (DBTDL), starmous octoate (SnOct), alkyl tin mercaptide (UL-29) and corresponding organotin/triethylene diamine (DABCO) systems in the polymerization process. Kinetic parameters were calculated with a non -linear optimization technique for a simple nth order model with an Arrhenius temperature dependence. The results suggest that activation energy is 130-170 kJ/mol and reaction heat is 61-72 kJ/eq. NCO. The catalyst activity is ordered as SnOct>DBTDL>UL - 29 and DBTDL/DABCO>UL - 29/DAB-CO>SnOct/DABCO. Overall reaction order is about 2 that is not related to catalyst activity.