高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (9): 1416.

• 论文 • 上一篇    

动态光散射对良溶剂中酚醛型聚醚砜的研究

饶蕾1, 马荣久2, 林德厚2   

  1. 1. 中国科学院长春应用化学研究所, 长春, 130022;
    2. 吉林大学化学系, 长春
  • 收稿日期:1993-09-24 修回日期:1993-12-18 出版日期:1994-09-24 发布日期:1994-09-24
  • 通讯作者: 饶蓄,女,29岁,硕士,助理研究员.
  • 作者简介:饶蓄,女,29岁,硕士,助理研究员.

Dynamic Light Scattering Study on Solution Properties of Phenolphthalein Polyaryl Ether Sulfones in Good Solvent

RAO Lei1, MA Rong-Jiu2, LIN De-Hou2   

  1. 1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun, 130022;
    2. Department of Chemistry, Jilin University, Changchun
  • Received:1993-09-24 Revised:1993-12-18 Online:1994-09-24 Published:1994-09-24

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摘要： 用动态光散射方法研究了酚酞型聚醚砜(PES-C)在良溶剂DMF中的稀溶液性质。在稀溶液中,PES-C分子由于内旋转发生链折叠,整体上表现出柔性链的性质,较好的符合球形模型;而分子链的局部刚性结构又使分子尺寸稳定;它的扩散行为随温度的变化符合Arrehnius方程。表征了PES-C分子在稀溶液中的形态结构,且给出了PES-C分子在DMF中的扩散系数、扩散活化能、无限稀时的扩散系数和流体力学半径等重要特征参数。

关键词: 动态光散射, 光子相关光谱, 酚酞型聚醚砜, 稀溶液

Abstract: The solution properties of phenolphthalein polyaryl ether sulfones(PES-C)in good solvent DMFhave been studied by dynamic light scattering.The average decay rate is given by Γ=q2Dt. The results show that diffusion of PES-Cmolecule in the system fits rigid-ball model. We obtained the diffusion coefficient of PES-Cmolecule as a function of the concentration and temperature. The hydrodynamic radii for the particle in the good solvent was calculated by means of Stokes-Einstein equation.The diffusion activation energy has been obtained from Arrehnius function, and it is not associated with concentration.

Key words: Dynamic light scattering, Photon correlation spectroscopy, Phenolphthalein polyaryl ether sulfones, Dilute solution

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