摘要
采用n级反应动力表示式和热传导方程建立了描述聚氨酯反应模塑(RIM)体系固化和温度的方法,并进行了相应的理论计算。结果表明:催化剂浓度、模具温度对固化过程和体系最大温度均有明显影响;反应物料的温度对体系的最大温度有影响,但对体系固化时间影响不大。厚模具内部的温度场接近绝热性质,其历史可用来确定反应动力和热力的相关参量。
This paper gives out a method to calculate curing and temperature of polyurethane reaction system with n-degree expression of reaction dynamics and equation of thermal conduction. The results show: concentration of the catalyst and temperature of mold obviously affect curing process and maximum temperature of reaction system; The temperature of reacting mixture affects the maximum temperature of reaction system, but has little effect on curing time. The temperature field of inner part in thick mold approaches adiabatic nature, and its history can be used to determine the reaction dynamic and thermal parameters of reaction.
出处
《化工生产与技术》
CAS
2001年第6期18-21,共4页
Chemical Production and Technology
