关键词: 结晶动力学, 流动诱导结晶, 构象张量, 晶体取向, 谱方法

Abstract: Based on the two-phase flow-induced crystallization model, according to the Avrami equation and the relationship between the nucleation rate and the first normal stress difference, spectral methods were used to calculate conformation tensor distribution function of amorphous phase and the orientation tensor distribution function of semi-crystalline phase, and then calculate the nucleation rate and crystallinity.The shear impact on crystallization rate of the system was predicted, and the evolution of the number of activation nucleation and crystal orientation was simulated.The results showed that the shearing actions had a significant impact on polymer crystallization kinetics, but the effect of shear on acceleration of polymer crystallization was limited, as the shear intensity increased, the effect on crystallization acceleration became no longer obvious.

Key words: crystallization kinetics, flow-induced crystallization, conformation tensor, crystal orientation, spectral method