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Water behavior of poly(vinyl alcohol)/poly(vinylpyrrolidone) interpenetrating polymer network hydrogels
Author(s) -
Kim Seon Jeong,
Park Sang Jun,
An Kay Hyeok,
Kim Nam Gyun,
Kim Sun I.
Publication year - 2003
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.12086
Subject(s) - vinyl alcohol , interpenetrating polymer network , self healing hydrogels , polymer chemistry , photoinitiator , differential scanning calorimetry , materials science , radical polymerization , relative humidity , chemical engineering , polymer , sorption , n vinylpyrrolidone , polymerization , monomer , chemistry , composite material , copolymer , organic chemistry , adsorption , physics , engineering , thermodynamics
Interpenetrating polymer network (IPN) hydrogels based on poly(vinyl alcohol) and 1‐vinyl‐2‐pyrrolidone were prepared by radical polymerization with 2,2‐dimethoxy‐2‐phenylacetophenone as a photoinitiator and N , N ′‐methylenebisacrylamide as a crosslinker. The IPN hydrogels were analyzed for the sorption behavior of water at 35°C and a relative humidity of 95% with a dynamic vapor sorption system, and water diffusion coefficients were calculated. Differential scanning calorimetry was used to quantitatively determine the amounts of freezing and nonfreezing water. The free‐water contents in the IPN hydrogel samples PV51, PV31, and PV11 were 74.40, 64.03, and 60.48% in pure water, respectively. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 24–27, 2003