DETERMINATION OF THE MOLECULAR-WEIGHT OF POLYACRYLAMIDE FRACTIONS BY OSMOMETRY

被引：36

作者：

MISRA, GS

BHATTACHARYA, SN

机构：

[1] Department of Post-Graduate Studies and Research in Chemistry, University of Jabalpur, Jabalpur

来源：

EUROPEAN POLYMER JOURNAL | 1979年 / 15卷 / 02期

关键词：

D O I：

10.1016/0014-3057(79)90196-4

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The polymerization of acrylamide, initiated with permanganate/oxalic acid, has been studied at 35 ± 0.2 in an aqueous medium under nitrogen. Samples of polyacrylamide were fractionated by the triangular fractionation method using methanol as non-solvent. Molecular weights of the fractions have been determined by viscometry and osmometry. Integral and differential distribution curves were plotted using the fractionation data. The narrow molecular weight distribution for high conversion polymers has been discussed. For fractionated samples of polyacrylamide in water at 30°, the equation [η]ml/g = 6.5 × 10-3 Mn0.82 is applicable for the molecular weight range 4 × 104 to 127 × 104. This equation is very similar to the equation [η]ml/g = 6.31 × 10-3 M/0.80 of Scholtan. Other parameters (osmotic second virial coefficient and unperturbed dimension) have also been evaluated. © 1979.

引用

页码：125 / 128

页数：4