【摘要】 采用 Cahn-Hilliard-Cook 理论模拟了二元共混聚合物体系的诱导周期性相分离.模拟结果显示,共混体系呈现二尺度相分离结构中,小尺度相区周期性的产生并消失,而大尺度相区逐渐增长.通过结因子的演化,讨论了二尺度相分离结构的形成机理,并且考察了相互用参数的震荡幅度与体系特征尺度的关系.更多还原

【Abstract】 Simulations were carried out for studying the periodic phase separation of a symmetric binary polymer blend on the basis of Cahn-Hilliard-Cook theory.The time dependent interaction parameter X(?) was assumed to undergo a step-wise oscillation.The hierarchic structures composed of both large and small domains were obtained.The mechanism of the periodic formation of hierarchic structures was also demonstrated.更多还原