加成型液体氟硅橡胶等温固化的分析与模拟

Analysis and Simulation of Isothermal Curing for Additive Liquid Fluorosilicone Rubber

通过旋转流变仪对环状含氢氟硅油(D_F^H)和四甲基四乙烯基环四硅氧烷(D_4^(Vi))发生硅氢加成反应得到的加成型液体氟硅橡胶的固化过程流变学进行了研究。研究了不同等温固化温度对该体系固化反应过程的影响,并得到了体系固化反应的凝胶点为α=0.63。讨论了体系的固化反应模型,确定了Kamal自催化模型适用于体系的固化反应,得到了相关的模型参数及Kamal自催化模型方程。Kamal自催化模型方程对加成型液体氟硅橡胶的固化过程有重要的指导意义。

In this paper, the rheology of curing process for the additive liquid fluorosilicone rubber, which was synthesized by the hydrosilylation reaction of cyclic hydrofluorosiliconoil(DFH) and 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane(D4Vi) was studied. The effects of different isothermal curing temperatures on the curing process of the system were investigated, the gel point(α=0.63) of the curing reaction was obtained. The curing reaction model of the system was discussed, and the Kamal autocatalytic model applied to the curing reaction of the system was determined. The related model parameters and the Kamal autocatalytic model equation were acquired. The Kamal autocatalytic model equation is of great guiding significance for the curing process of the additive liquid fluorosilicone rubber.