RIM聚氨酯快速反应动力学研究  

KINETIC STUDY OF REACTION INJECTION MOLDING OF POLYURETHANE

作　　者：潘碧莲[1] 徐强[1] 姜志国[1] 

机构地区：[1]北京化工学院高分子系,北京10029

出　　处：《高分子材料科学与工程》1993年第2期6-12,共7页Polymer Materials Science & Engineering

摘　　要：用自行研制的绝热流变仪研究了RIM聚氨酯快速反应动力学。确定了以二丁基锡二月桂酸酯[DBTDL]为催化剂时,高活性聚醚和改性MDI的反应动力学方程。当[DBTDB]<0.56mol/m^3时,非催化反应起主要作用,在整个转化率范围内符合二级反应动力学;当[DBTDL]≥0.56mol/m^3时,催化反应为主,二级反应只在凝胶点之前适用。改进了Macesko机理,合理地解释了RIM聚氨酯快速反应历程。The kinetics of a fast polyurethane cure (RIM) was studied with a homemade adiabatic rheomcter. The kinetic equation of the fast polymerization between polyether polyol and modifed MDI with DBTDL as catalyst was derived. When the DBTDL concentration < 0. 56 mol/m3, the catalytic reaction is limited, and second-order kinetic was found in the whole range of the convension observed. Howerver, as the DBTDL concentration > 0. 56 mol/m3, the catalytic reaction dominate, corrsponding to the second-order kinetics until the gelpoint. Simultaneously the Macosko principle was revised and the fast reactive course was explained reasonably.

关 键 词：反应注射成型 反应动力学 聚氨酯 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]