Super absorbent hydrogels: Interpenetrating networks of poly(acrylamide-co-acrylic acid) and poly(vinyl alcohol): Swelling behavior and structural parameters

被引：32

作者：

Dhara, D ^{[1
]}

Nisha, CK ^{[1
]}

Chatterji, PR ^{[1
]}

机构：

[1] Indian Inst Chem Technol, Organ Coating & Polymers Div, Specialty Polymers Grp, Hyderabad 500007, Andhra Pradesh, India

来源：

JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY | 1999年 / A36卷 / 02期

关键词：

superabsorbent; hydrogels; interpenetrating polymer networks;

D O I：

10.1081/MA-100101525

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 series of semi- and full interpenetrating networks (IPNs) of poly(acrylamide-co-acrylic acid) and poly(vinyl alcohol) were synthesized by polymerizing an aqueous solution of acrylamide, acrylic acid and N,N/-methylenebis(acrylamide) in the presence of poly(vinyl alcohol) (PVA). PVA. was crosslinked with glutaraldehyde in a subsequent step. The swelling behavior of the IPNs were monitored as a function of composition of the IPNs, extent of crosslinking of PVA, pH and ionic strength of the swelling medium. Incorporation of acrylic acid raises the swelling ratio several fold while crosslinking of PVA suppresses it. The IPNs being ionic, swelling is affected by the pH and ionic strength df the medium. The basic structural parameter of the gel network M-C, the crosslink dimension was calculated using the Flory-Rehner equation. The swelling can be effectively varied by adjusting acrylic acid content and extent of crosslinking of PVA.

引用

页码：197 / 210

页数：14

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