低压SMC体系的固化动力学及凝胶化理论  

The Curing Kinetics and Gel Kinetics of Low Pressure Sheet Molding Compounds

作　　者：秦岩[1] 刘海华[1] 梅启林[1] 黄志雄[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070

出　　处：《高分子材料科学与工程》2008年第4期105-108,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50473013);国家"863"项目(2003AA333070)

摘　　要：运用等温DSC对结晶聚合物(PEG6000-MAH)增稠低压SMC体系进行扫描测试,确定了适用于该体系的自催化经验动力学模型的相关参数和动力学方程。用确定的固化度验证该模型,实验情况与理论结果吻合较好。依据凝胶化时体系黏度变化的特性,通过黏度的测定获得了体系在不同温度的凝胶时间,建立了凝胶化理论模型。固化动力学模型和凝胶化理论模型的建立为低压SMC压制工艺制度的确立提供了理论指导和依据。Correlated kinetic parameters and kinetic equation of the autocatalytic empirical kinetic model of LPSMC system were determined by using isothermal DSC to scan the system thickened by crystalline polymer （PEG-MAIl）. The experimental results are identical with the predictions of the autocatalytic empirical kinetic model basically through using a serial curing degree to validate the modal. According to the variation characteristics of the viscosity during the gelation process, the geltime of the system at different temperature was obtained by mensurating the viscosity of the system. Besides, the gelling theory of the system was also successfully established. The curing kinetics model and gelling theory of the system can provide a theoretical reference to the determination of molding techniques of LPSMC.

关 键 词：结晶聚合物 低压SMC 固化动力学 凝胶动力学 模型 

分 类 号：TQ327.1[化学工程—合成树脂塑料工业]