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Thermal characteristics of interpenetrating polymer networks composed of poly(vinyl alcohol) and poly( N ‐isopropylacrylamide)
Author(s) -
Kim Seon Jeong,
Park Sang Jun,
Kim In Young,
Chung Taek Dong,
Kim Hee Chan,
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.12794
Subject(s) - thermogravimetric analysis , differential scanning calorimetry , vinyl alcohol , materials science , poly(n isopropylacrylamide) , polymer chemistry , interpenetrating polymer network , glass transition , polymer , thermal decomposition , chemical engineering , copolymer , composite material , chemistry , thermodynamics , organic chemistry , physics , engineering
Interpenetrating polymer networks (IPNs) composed of poly(vinyl alcohol) (PVA) and poly( N ‐isopropylacrylamide) (PNIPAAm) were prepared by the sequential‐IPN method. The thermal characterization of the IPNs was investigated using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and dielectric analysis (DEA). Depression of the melting temperature ( T m ) of the PVA segment in IPNs was observed with increasing PNIPAAm content using DSC. DEA was employed to ascertain the glass‐transition temperature ( T g ) of IPNs. From the result of DEA, IPNs exhibited two T g values, indicating the presence of phase separation in the IPNs. The thermal decomposition of IPNs was investigated using TGA and appeared at near 200°C. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 881–885, 2003