Journal
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING
Volume 49, Issue 6, Pages 609-616Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/03602551003664537
Keywords
Acrylamide; Hydrogels; Sodium acrylate; Solvents; Swelling
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Swelling behavior of acrylamide (AAm)/sodium acrylate (SA) hydrogels was investigated in water-solvent (methanol, ethanol, t-butanol and acetone) mixtures of various compositions. AAm/SA hydrogels were prepared by free radical solution polymerization in aqueous solutions of AAm with SA as comonomers and a multifunctional cross-linker such as trimethylolpropane triacrylate (TMPTA). Swelling experiments were performed in water and water-organic solvent mixtures of various compositions at 25 degrees C, gravimetrically. The value of Seq% of AAm/SAhydrogels are 64-152% for 60% of metanol, 84-102% for 60% of ethanol, 127-176% for 60% of t-butanol, 131-585% for 60% of acetone, while the value of Seq% of AAm/SA hydrogels are 780-4510% for water and water-solvent mixtures. Some swelling kinetic parameters were found. Diffusion behavior of water and water-solvent mixtures was investigated. Diffusion of water and water-solvent mixtures into the hydrogels was found to be non-Fickian in character.
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