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Interpenetrating polymer network (IPN) hydrogels base don poly(vinyl alcohol) (PVA) and poly)N-isopropylacrylamide) (PNIPAAm) were prepared by the sequential-IPN method. The IPN hydrogels were analyzed for sorption behavior of water at 35°C and at a relative humidity of 95% using a dynamic vapor sorption system, and water diffusion coefficients were calculated. Differential scanning calorimetry was used for the quantitative determination of the amounts of freezing and non-freezing water. Free water contents in the IPN hydrogel of IPN1, IPN2 and IPN3 were 45.8, 37.9 and 33.1% in pure water, respectively.
Seon Jeong Kim,Sang Jun Park,Seoung Gil Yoon,Ki Jung Lee,Young Moo Lee,Si Bog Park, andSun I. Kim
"Characterizations of interpenetrating polymer network hydrogels composed of poly(vinyl alcohol) and poly(N-isopropylacrylamide)", Proc. SPIE 4934, Smart Materials II, (13 November 2002); https://doi.org/10.1117/12.469181
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Seon Jeong Kim, Sang Jun Park, Seoung Gil Yoon, Ki Jung Lee, Young Moo Lee, Si Bog Park, Sun I. Kim, "Characterizations of interpenetrating polymer network hydrogels composed of poly(vinyl alcohol) and poly(N-isopropylacrylamide)," Proc. SPIE 4934, Smart Materials II, (13 November 2002); https://doi.org/10.1117/12.469181