中华医学超声杂志

应用化学 ›› 1992, Vol. 0 ›› Issue (2): 23-27.

• 研究论文 • 上一篇    下一篇

高分子混合体系相分离过程相结构的自相似与分形

宋默1, 黄玉惠1, 丛广民1, 姜炳政2   

  1. 1. 中国科学院长春应用化学研究所, 广州 510650;
    2. 中国科学院长春应用化学研究所
  • 收稿日期:1991-03-14 修回日期:1991-06-25 出版日期:1992-04-10 发布日期:1992-04-10
  • 基金资助:
    国家自然科学基金

SELF-SIMILARITY AND FRACTAL OF PHASE SEPARATION PROCESSES IN POLYMER BLENDS

Song Mo1, Huang Yuhui1, Cong Guangmin1, Jiang Bingzheng2   

  1. 1. Guangzhou Institute of Chemistry, Academia Sinica, Guangzhou 510650;
    2. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun
  • Received:1991-03-14 Revised:1991-06-25 Published:1992-04-10 Online:1992-04-10

PDF

455

被引次数

2

摘要： 本工作用激光光散射和光学显微镜手段研究了聚甲基丙烯酸甲醋(PMMA)和聚醋酸乙烯酯[PVAc]共混体系相分离过程。结果表明系统的相态结构呈现较强的自相似,结构函数在大波矢处具有q-6的渐近行为,相结构具有分形特征,其分形维数[Fractal Dimension]D约为1.64,初步认为结构函数的标度[Scaling]行为是由于相结构的分形特征所致。

关键词: 相分离, 分形, 标度, 光散射, 结构函数

Abstract: Unmixing processes of poly (methyl methacrylate) and poly (vinyl acetate)blends were investigated by using light scattering and optical microscope techniques. The results show that there exist self-similarity and fractal behaviour in phase separation processes. In the late stage of phase separation the asymptotic behavior of scaled structure function F(x) is F(x)～x-6 for large values of x. The fractal dimension of phase structure is about 1.64. These imply that the fractal behaviour of phase structure may result in the scaling feature of structure function.

Key words: phase separation, fractal, scaling, light scattering, structure function

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