MEASUREMENT OF DIFFUSION-COEFFICIENTS OF POLYMER-SOLUTIONS USING THE ULTRA-CENTRIFUGE

被引：16

作者：

AMINABHAVI, TM ^{[1
]}

MUNK, P ^{[1
]}

机构：

[1] UNIV TEXAS,DEPT CHEM,AUSTIN,TX 78712

来源：

MACROMOLECULES | 1979年 / 12卷 / 06期

关键词：

D O I：

10.1021/ma60072a035

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A diffusion experiment in the synthetic boundary cell of an ultracentrifuge yields reproducible values of the diffusion coefficient. For poor and intermediate solvents, these values (uncorrected for the effect of polymer concentration) lead to reasonable values of the Flory-Mandelkern invariant β. Hence, the method in combination with the measurement of either the intrinsic viscosity or the sedimentation coefficient may yield a good estimate of molecular weight. However, for good solvents (highly nonideal solutions), the effect of the polymer concentration cannot be neglected. © 1979, American Chemical Society. All rights reserved.

引用

页码：1194 / 1196

页数：3

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