高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (S1): 249.

• 研究论文 • 上一篇    下一篇

凝胶化反应中标度行为及凝胶化点关系

牛爱珍1,2, 安英丽1, 冉少峰2, 梁德海2, 左榘1,2, 何炳林1   

  1. 1. 南开大学吸附分离功能高分子材料国家重点实验室, 天津 300071;
    2. 南开大学化学系, 天津 300071
  • 收稿日期:2001-07-31 出版日期:2001-12-31 发布日期:2001-12-31
  • 通讯作者: 左榘(1939年出生),女,硕士,博士生导师,从事高分子功能及应用高分子材料结构性能关系研究.
  • 基金资助:

    国家自然科学基金(批准号:29774011)资助.

Laser Light Scattering Study on Fractal Behavior of Polystyrene Gelation

NIU Ai-Zhen1,2, AN Ying-Li1, RAN Shao-Feng2, LIANG De-Hai2, ZUO Ju1,2, HE Bing-Lin1   

  1. 1. State Key Laboratory of Functional Polymeric Materials for Adsorption and Separation, Tianjin 300071, China;
    2. Department of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2001-07-31 Online:2001-12-31 Published:2001-12-31

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被引次数

2

摘要：

在苯乙烯(St)-二乙烯苯(DVB)自由基聚合的凝胶化反应过程中,定时取样,得到凝胶化点前后及直至反应终点的一系列溶胶样品,利用光散射技术研究了溶胶相的重均分子量Mw、尺寸均方旋转半径Rg的变化过程,建立了Mw、Rg和反应时间t的标度关系,并在此基础上提出一神新的准确求取凝胶化时间tgel的方法.

关键词: 凝胶化时间, 标度关系, 激光光散射, 分形行为

Abstract:

The fractal behavior of gelation of styrene (St) and divinylbenzene (DVB) free radical copolymerization was studied by using laser light scattering. The weight average molar mass (Mw) and the radius of gyration (Rg) of sols were used to monitor the gelation process by using the scaling laws of Mw and Rg with the reaction time t. On the basis of these scaling laws, one new method to obtain the gelation point time was reported.

Key words: Gelation time, Scaling law, Laser light scattering, Fractal behavior

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