| 动态光散射对良溶剂中酚醛型聚醚砜的研究 |
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| 引用本文： | 饶蕾,马荣久,林德厚.动态光散射对良溶剂中酚醛型聚醚砜的研究[J].高等学校化学学报,1994,15(9):1416. |
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| 作者姓名： | 饶蕾 马荣久 林德厚 |
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| 作者单位： | 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 |
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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。
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| 关 键 词： | 动态光散射 光子相关光谱 酚酞型聚醚砜 稀溶液 |
| 收稿时间： | 1993-09-24 |
Dynamic Light Scattering Study on Solution Properties of Phenolphthalein Polyaryl Ether Sulfones in Good Solvent |
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| RAO Lei,MA Rong-Jiu,LIN De-Hou.Dynamic Light Scattering Study on Solution Properties of Phenolphthalein Polyaryl Ether Sulfones in Good Solvent[J].Chemical Research In Chinese Universities,1994,15(9):1416. |
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| Authors: | RAO Lei MA Rong-Jiu LIN De-Hou |
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| Institution: | 1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun, 130022;
2. Department of Chemistry, Jilin University, Changchun |
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| 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. |
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| Keywords: | Dynamic light scattering Photon correlation spectroscopy Phenolphthalein polyaryl ether sulfones Dilute solution |
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