Thermal characteristics of interpenetrating polymer networks composed of poly(vinyl alcohol) and poly(N-isopropylacrylamide)

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 (TG...

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Bibliographic Details
Published in:Journal of applied polymer science 2003-10, Vol.90 (3), p.881-885
Main Authors: Kim, Seon Jeong, Park, Sang Jun, Kim, In Young, Chung, Taek Dong, Kim, Hee Chan, Kim, Sun I.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
glass transition
interpenetrating networks (IPN)
Organic polymers
Physicochemistry of polymers
poly(N-isopropylacrylamide)
poly(vinyl alcohol) (PVA)
Properties and characterization
Thermal and thermodynamic properties
thermal properties
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Summary: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 (Tm) of the PVA segment in IPNs was observed with increasing PNIPAAm content using DSC. DEA was employed to ascertain the glass‐transition temperature (Tg) of IPNs. From the result of DEA, IPNs exhibited two Tg 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
ISSN:0021-8995
1097-4628
DOI:10.1002/app.12794