高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (2): 321.

• 研究论文 • 上一篇    下一篇

温度梯度引起的聚合物共混物梯度相形态的研究

俞炜, 周持兴   

  1. 上海交通大学高分子科学与工程系, 上海 200240
  • 收稿日期:1999-12-23 出版日期:2001-02-24 发布日期:2001-02-24
  • 通讯作者: 周持兴(1943年出生),男,教授,博士生导师,主要从事聚合物及其共混、复合体系加工流变学研究.
  • 基金资助:

    国家自然科学基金(批准号:296340302)资助

Studies on the Gradient Phase Morphology of Polymer Blends Caused by Temperature Gardient

YU Wei, ZHOU Chi-Xing   

  1. Department of Polymer Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:1999-12-23 Online:2001-02-24 Published:2001-02-24

摘要: 研究了两相不相容聚合物共混物在静态退火时,由温度梯度引起的分散相尺寸的空间分布梯度相形态,讨论了分散相体积分数和两相之间界面张力对梯度形态形成的影响.应用接触凝聚模型计算了在温度梯度作用下,分散相粒子的粗化过程.计算结果表明,界面张力越大,或者分散相体积分数越大,形成的梯度相形态越明显;并且在温度梯度存在下,分散相粒子粗化的速度加快.

关键词: 共混物, 梯度相形态, 温度梯度

Abstract: The gradient phase morphology of polymer blends caused by temperature gradient during quiescent annealing process was studied. The influence of volume fraction of dispersed phase and interfacial tension on the gradient phase morphology was discussed. The coarsening behavior of dispersed phase under temperature gradient was computed by the touch-coalescence mechanism. The results show that the degree of gradient phase morphology increases with interfacial tension and volume fraction of dispersed phase.

Key words: Blends, Gradient phase morphology, Temperature gradient

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