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Syntheses and Swelling Behaviors of Poly(n-isopropylacrylamide-co-acrylonitrile) Hydrogels  

Piao, Zhe Fan (Department of Organic Materials and Fiber Engineering, Soongsil University)
Ham, Myong-Jo (Department of Organic Materials and Fiber Engineering, Soongsil University)
Kim, Young-Ho (Department of Organic Materials and Fiber Engineering, Soongsil University)
Publication Information
Polymer(Korea) / v.31, no.4, 2007 , pp. 349-355 More about this Journal
Abstract
Poly(N-isopropylacrylamide-co-acrylonitrile) [P(NIPAAm-co-AN)] copolymers with AN content of up to 10 mol% and their hydrogels were synthesized using water as a reaction medium, and the effects of AN unit incorporation on the critical gel transition temperature(CGTT) and swelling behaviors of the hydrogels were investigated. The CGTT of the copolymer hydrogel was $30{\sim}32\;^{\circ}C$, decreasing with increasing AN content. Below CGTT, swelling rate and equilibrium swelling ratio of the copolymer hydrogel decreased with increasing AN content. On the other hand, it exhibited faster deswelling and lower equilibrium deswelling ratio with increasing AN content above CGTT.
Keywords
poly(N-isopropylacrylamide); acrylonitrile; hydrogel; critical gel transition temperature (CGTT); swelling behavior;
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