动态光散射对良溶剂中酚醛型聚醚砜的研究  

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

作　　者：饶蕾[1] 马荣久[1] 林德厚[1] 

机构地区：[1]中国科学院长春应用化学研究所,吉林大学化学系

出　　处：《高等学校化学学报》1994年第9期1416-1419,共4页Chemical Journal of Chinese Universities

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。The solution properties of phenolphthalein polyaryl ether sulfones(PES-C)in good solvent DMF have been studied by dynamic light scattering.The average decay rate is given by Γ=q￣2Dt. The results show that diffusion of PES-C molecule in the system fits rigid-ball model. We obtained the diffusion coefficient of PES-C molecule 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.

关 键 词：动态光散射 酚酞型 聚醚砜 DMF 

分 类 号：O632.32[理学—高分子化学]