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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.
The Cahn-Hilliard-Cook theory is used to simulate the induced periodic phase separation of binary polymer systems. The simulation results show that the mixed system appears periodically and disappears in the two-scale phase separation structure The large-scale phase region grows gradually. The formation mechanism of the second-order phase separation structure is discussed by the evolution of the knot factor. The relationship between the oscillation amplitude of the mutual parameter and the characteristic scale of the system is also discussed.