Swelling characterization of poly (acrylamide-<Emphasis Type="Italic">co</Emphasis>-<Emphasis Type="Italic">N</Emphasis>-vinylimidazole) hydrogels crosslinked by TMPTA and semi-IPN’s with PEG |
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Authors: | Ömer Bar?? Üzüm Erdener Karada? |
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Affiliation: | (1) Department of Chemistry, Adnan Menderes University, Fen-Edebiyat Faculty, 09010 Aydın, Turkey |
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Abstract: | In this study, a novel semi-interpenetrating network (semi-IPN’s) hydrogel, composed of acrylamide (AAm) with N-vinylimidazole (NVI) as comonomer, with poly (ethylene glycol)(PEG) and a multifunctional crosslinker such as trimethylolpropane
triacrylate (TMPTA) was prepared. Highly swollen poly (AAm/NVI) hydrogels and semi-IPN’s were synthesized by free radical
solution polymerization. Swelling experiments were performed in water at 25°C, gravimetrically. The influence of NVI and PEG
content in hydrogels were examined. Poly (AAm/NVI) and poly (AAm/NVI/PEG) hydrogels showed large extents of swelling in aqueous
media the swelling being highly dependent on the chemical composition of the hydrogels. Swelling ratio of poly (AAm/NVI) hydrogels
and poly (AAm/NVI/PEG) hydrogels was shown 7.16–39.85. Diffusion behavior was investigated. Water diffusion into hydrogels
was found to be non-Fickian in character. This study has given the quantitative information on the swelling characteristic of poly (AAm/NVI) hydrogel
and semi-IPN’s as water absorbent in many potential applications. |
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Keywords: | Swelling Hydrogel Interpenetrating polymer networks Acrylamide N-vinylimidazole Poly (ethylene glycol) |
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