【摘要】 用Monte Carlo方法模拟了聚氧化乙烯(PEO)在预先成核条件下的等温结晶过程,并用Avrami方程进行了结晶动力学处理。结果显示,Avrami方程能够成功地描述被模拟的PEO等温结晶的初期过程。随着结晶温度的升高,结晶速率和球晶的线生长速率减小,而Avrami指数值基本不变,都接近于3。采用热台偏光显微镜(HSPOM)实验证实了模拟实验模型和结果的正确性。更多还原

【Abstract】 Isothermal crystallization of poly(ethylene oxide)(PEO) under predetermined nucleation condition was simulated by use of Monte Carlo method and treated by the Avrami equation.The results show that the Avrami equation is able to successfully describe the simulated isothermal crystallization process of PEO.With the increase of crystallization temperature,the crystallization rate and the linear growth rate of spherulites decrease,while the Avrami exponent,approaching 3,almost remains unchanged.Further,the hot stage of polarized optical microscopy(HSPOM) was employed to confirm the validity of the established simulation model and the conclusions from simulation experiment.更多还原