INTRA-MOLECULAR MOTION OF POLYSTYRENE IN A THETA MIXED-SOLVENT BY PHOTON-CORRELATION SPECTROSCOPY

被引：13

作者：

JONES, G

CAROLINE, D

机构：

[1] School of Physical and Molecular Sciences, University College of North Wales, Bangor

来源：

CHEMICAL PHYSICS | 1979年 / 40卷 / 1-2期

关键词：

D O I：

10.1016/0301-0104(79)85128-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The dynamics of polystyrene in a theta mixed solvent (80.25 vol % carbon tetrachloride/methanol at 25°C) have been investigated using photon-correlation spectroscopy. Measurements of the diffusion coefficient D and first-mode intramolecular relaxation time τ, have been made in dilute solutions for four narrow functions with M̄w between 2.38 × 106 and 6.77 × 106. The hydrodynamic radii Rh were found to be identical with those measured in a previous study of a theta single solvent (cyclohexane at 34.5°C) with Rh = 0.288M0.5 Å, and the values of τi again support Zimm's non-draining bead-and-spring model. © 1979.

引用

页码：153 / 156

页数：4

共 10 条

[1] HYDRODYNAMIC INTERACTION AND DYNAMIC INTRINSIC-VISCOSITY OF A FLEXIBLE POLYMER [J].