Studies on Oxalic Acid as a Crosslinker of Polyvinyl Alcohol

被引：16

作者：

Gohil, J. M. ^{[1
]}

Ray, P. ^{[1
]}

机构：

[1] Cent Salt & Marine Chem Res Inst CSIR, Reverse Osmosis Discipline, Bhavnagar 364002, Gujarat, India

来源：

POLYMERS & POLYMER COMPOSITES | 2009年 / 17卷 / 07期

关键词：

POLY(VINYL ALCOHOL); MEMBRANES; COMPOSITE; NETWORKS; LINKING;

D O I：

10.1177/096739110901700702

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The suitability of oxalic acid as a crosslinker of polyvinyl alcohol (PVA) is the focus of study of the present paper. Oxalic acid concentration was varied from 3-70% (w/w with respect to polymer) and curing was carried out at various temperatures (100-140 degrees C) for a range of time periods (20-120 minutes). The optimum curative dose and curing conditions were evaluated through systematic swelling studies (% swelling, gel content, swelling ratio and molecular weight between the crosslinks) of the oxalic acid-treated PVA films, both in hot and cold water. Thermogravimetric analysis showed higher heat stability of oxalic acid crosslinked PVA film compared with heat-treated and virgin PVA. The shift in glass transition temperature (from that of virgin PVA 86 degrees C) to a higher value for heat-treated and oxalic acid-treated PVA was more prominent for the former than the later. Crosslinking enhanced the Young's modulus and IR spectra indicate the formation of ester carbonyl group in crosslinked PVA.

引用

页码：403 / 410

页数：8

共 28 条

[1] Poly(vinyl alcohol) stabilisation in thermoplastic processing [J].