Thermal Characterizations of Semi-Interpenetrating Polymer Networks Composed of Poly(ethylene oxide) and Poly(N-isopropylacrylamide)

Seon Jeona Kim, Chang Kee Lee, Young Moo Lee, Kyu Back Lee, Yong Doo Park, Sun I. Kim

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Poly(N-isopropylacrylamide) (PNIPAAm)/poly(ethylene oxide) (PEO) semi-interpenetrating polymer networks (semi-IPNs) synthesized by radical polymerization of N-isopropylacrylamide (NIPAAm) in the presence of PEO. The thermal characterizations of the semi-IPNs were investigated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and dielectric analysis (DEA). The melting temperature (Tm) of semi-IPNs appeared at around 60°C using DSC. DEA was employed to ascertain the glass transition temperature (Tg) and determine the activation energy (Ea) of semi-IPNs. From the results of DEA, semi-IPNs exhibited one Tg indicating the presence of phase separation in the semi-IPN, and Tgs of semi-IPNs were observed with increasing PNIPAAm content. The thermal decomposition of semi-IPNa was investigated using TGA and appeared at around 370°C.

Original languageEnglish
Pages (from-to)3922-3927
Number of pages6
JournalJournal of Applied Polymer Science
Volume90
Issue number14
DOIs
Publication statusPublished - 2003 Dec 27

Keywords

  • Activation energy
  • Poly(N-isopropylacrylamide)
  • Poly(ethylene oxide)
  • Thermal properties

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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