Radical Copolymerization of N-(4-Acetyl phenyl)-maleimide and Styrene: Monomer Reactivity Ratios and Thermal Properties

SOYKAN C., Erol I.

Journal of Applied Polymer Science, cilt.91, sa.2, ss.964-970, 2004 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 91 Sayı: 2
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1002/app.13296
  • Dergi Adı: Journal of Applied Polymer Science
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.964-970
  • Anahtar Kelimeler: Glass transition, Radical polymerization
  • Uşak Üniversitesi Adresli: Evet

Özet

Copolymers containing N-(4-acetyl phenyl)-maleimide (NAPMI) and styrene (ST) at different compositions have been prepared by radical copolymerization. FTIR, 1H-, and 13C NMR and elemental analysis techniques were used on the identification of polymers. The monomer reactivity ratios were estimated using the Kelen-Tüdös (KT) and Fineman-Ross (FR) graphical methods. Structural parameters of the copolymers were obtained calculating the dyad monomer sequence fractions. A thermal study of the obtained copolymers related to the N-(4-acetyl phenyl)maleimide content has been carried out taking into account several theories predicting the depence of the glass transition temperature on the copolymers composition. The Tgs are linearly distributed between Tgs of homopolymers and in all cases, single, well-defined Tgs are obtained. Glass transition temperatures increase with the increase of molar fraction of N-(4-acetylphenyl)maleimide. © 2003 Wiley Periodicals, Inc.