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Equilibrium swelling studies of highly swollen acrylamide/mesaconic acid hydrogels
Author(s) -
Üzüm Ömer Barış,
Karadağ Erdener
Publication year - 2005
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.21705
Subject(s) - self healing hydrogels , comonomer , swelling , ethylene glycol dimethacrylate , acrylamide , polymer chemistry , diffusion , polymerization , radical polymerization , chemistry , aqueous solution , ethylene glycol , chemical engineering , materials science , nuclear chemistry , polymer , monomer , organic chemistry , composite material , methacrylic acid , thermodynamics , physics , engineering
Abstract Acrylamide/mesaconic acid (AAm/MA) hydrogels were prepared by free radical solution polymerization in aqueous solution of acrylamide (AAm) with mesaconic acid (MA) as comonomer and two multifunctional crosslinkers such as ethylene glycol dimethacrylate (EGDMA) and 1,4‐butanediol dimethacrylate (BDMA). Swelling experiments were performed in water at 25°C, gravimetrically. The influence of mesaconic acid content in hydrogels was examined. Swelling of AAm/MA hydrogels was increased up to 2301% (for containing 20 mg MA and crosslinked by EGDMA) to 3296% (for containing 80 mg MA and crosslinked by BDMA), while AAm hydrogels swelled up to 1330% (crosslinked by BDMA) to 1400% (crosslinked by EGDMA). The values of equilibrium water content of the hydrogels are 0.9301–0.9706. Diffusion behavior was investigated. Water diffusion into hydrogels was found to be non‐Fickian in character. Diffusion coefficients of AAm/MA hydrogels were calculated by the short time approximation and found to be from 38.01 × 10 −6 cm 2 s −1 to 182.73 × 10 −6 cm 2 s −1 . © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 2253–2259, 2005