关键词: 硅橡胶, 动力学研究, 硫化, 数值模拟

Based on chemical reaction kinetics, the kinetic model of hydrosilation is determined by experiment. The definition of increment of vulcanization ratio is introduced, so the numerical computation expression of fulldose of vulcanization ratio is obtained. According to statistical theory, the numerical computation expressions of various parameters of crosslinking structure are derived, while the original molecules are distributed in Flory manner. The simulation procedures of unstable vulcanization field are introduced. On this basis, the numerical simulation software of vulcanization process of silicone rubber is designed. Adopting the software, according to initial condition and boundary condition, the specific values of various parameters of crosslinking reaction and structure on any point in vulcanization field can be calculated at any time. Thereby, the properties of products can be forecasted and the reaction parameters can be optimized, or th original polymeric material can be optimized. Finally, the rationality of the simulation theory and algorithm is verified by one typical example and its hardness test.

Key words: SILICONE RUBBER, KINETIC STUDY, CURING, NUMERICAL SIMULATION