第三相界面对高分子共混物粗化过程的影响研究

Studies on the Effects of the Third Phase on the Coarsening of Incompatible Polymer Blends

共混物相分离的机理已有研究［１］．但对共混物分散相的粗化过程的研究则不多见．１９７７年，Ｃａｈｎ等［２］预言第三相界面与低分子共混物之间存在的浸润作用对相分离过程应有较大影响．近年Ｔａｎａｋａ等［３］的研究结果表明，在几何空间受限的条件下，含有小分子...

In this study, phase contrast microscope and computer image analyzer were used to study the coarsening process of the dispersed phase of the polymer blend (PP/EVAc) under 2 dimensional and 3 dimensional conditions. The results showed that under 3 dimensional condition, the growth of the dispersed phase follows r 3～t 1.01 , corresponding to the evaporation condensation theory of Lifshitz Slyozov r 3～t , while under 2 dimensional condition the growth law is r 3～t 1.32 . The growth speed of the dispersed droplets under 2 dimensional condition is faster than that under 3 dimensional condition. This difference is caused by the wetting effects between the third phase and polymer blend.