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本文用激光光散射和光学显微镜方法研究了聚甲基丙烯酸甲脂/聚醋酸乙烯酯共混体系不稳相分离过程最大散射强度I_m(t,T)和相应波矢q_m(t,T)随时间变化规律及相区的逾渗结构。实验结果表明:I_m(t,T)和q_m(t,T)与时间t满足简单的标度关系I_m(t,T)～t~β,q_m(t,T)～t~(-a)。且标度关系β=3α成立,首次揭示了相态结构的分维特征,给出了计算相态结构分维数的简便方法,其分维数D值约为1.68±0.03,与逾渗模型给出的D值接近。
In this paper, the maximum scattering intensity I_m (t, T) and the corresponding wave vector q_m (t, T) of polymethylmethacrylate / polyvinyl acetate blends were investigated by laser light scattering and optical microscopy Time variation and percolation structure in phase region. The experimental results show that I_m (t, T) and q_m (t, T) and time t satisfy the simple scale relationship I_m (t, T) ~ t ~ β and q_m (t, T) ~ t ~ (-a) . And the scale relation β = 3α holds, the fractal dimension feature of phase structure is revealed for the first time. A simple method to calculate the fractal dimension of phase structure is given. The fractal dimension D is about 1.68 ± 0.03, The value of D is close.