Preparation and characterization of polyacrylic acid-poly(vinyl alcohol)-based interpenetrating hydrogels

被引:21
作者
Hernandez, Rebeca [1 ]
Lopez, Daniel [1 ]
Mijangos, Carmen [1 ]
机构
[1] CSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, Spain
关键词
polyacrylic acid hydrogels; viscoelastic properties; swelling properties; interpenetrating polymer hydrogels;
D O I
10.1002/app.24397
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Some structural features of hydrogels from poly(acrylic acid) (PAAc) of various crosslinking degrees have been investigated through mechanical and swelling measurements. Interpenetrating polymer hydrogels (IPHs) of poly(vinyl alcohol) (PVA) and PAAc have been prepared by a sequential method: crosslinked PAAc chains were formed in aqueous solution by crosslinking copolymerization of acrylic acid and N,N-methylenebisacrylamide in the presence of PVA. The application of freeze-thaw (F-T) cycles leads to the formation of a PVA hydrogel within the synthesized PAAc hydrogel. The swelling and viscoelastic properties of the IPHs were evaluated as a function of the content of crosslinker and the application of one F-T cycle. (c) 2006 Wiley Periodicals, Inc.
引用
收藏
页码:5789 / 5794
页数:6
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