STATES OF WATER IN POLY(METHYL METHACRYLATE-CO-N-VINYL-2-PYRROLIDONE) HYDROGELS DURING SWELLING

被引：36

作者：

AHMAD, MB ^{[1
]}

HUGLIN, MB ^{[1
]}

机构：

[1] UNIV SALFORD,DEPT CHEM & APPL CHEM,SALFORD M5 4WT,LANCS,ENGLAND

来源：

POLYMER | 1994年 / 35卷 / 09期

关键词：

HYDROGEL; DIFFERENTIAL SCANNING CALORIMETRY; WATER SORPTION;

D O I：

10.1016/0032-3861(94)90995-4

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Crosslinked copolymers of methyl methacrylate with N-vinyl-2-pyrrolidone of various compositions were prepared to high conversion by gamma-irradiation and swollen in water to yield equilibrium water contents of 15-76 wt%. Differential scanning calorimetry was used to probe the states of water in the hydrogels prior to equilibrium swelling. Diffusion coefficients of water decreased about 100-fold as the effective crosslinking density of the polymers increased by the same factor. The relative uptake of the non-freezing water was found to be more rapid than that of the total freezing water.

引用

页码：1997 / 2000

页数：4

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