Chem. J. Chinese Universities ›› 1998, Vol. 19 ›› Issue (11): 1864.

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

XIE Xu-Ming, XIAO Tian-Jing, YANG Yong   

  1. Advanced Material Key Laboratory of National Education Commission, Department of Chemical Engineering, Institute of Polymer Science and Engineering, Tsinghua University, Beijing, 100084
  • Received:1997-09-02 Online:1998-11-24 Published:1998-11-24

Abstract: 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 r3~t1.01, corresponding to the evaporation condensation theory of LifshitzSlyozov——r3~t, while under 2-dimensional condition the growth law is r3~t1.32. 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.

Key words: Polypropylene, Ethylene-vinyl acetate copolymer, Coarsening, The third phase interface, Wetting effect

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