Responsive freeze-drying interpolymeric associations of alginic acid and poly(N-isopropyl acrylamide). Ii. transition and temperature dependence on ph and composition

YILMAZ C. N., Vasile C.

Cellulose Chemistry and Technology, cilt.42, sa.4-6, ss.207-212, 2008 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 42 Sayı: 4-6
  • Basım Tarihi: 2008
  • Dergi Adı: Cellulose Chemistry and Technology
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.207-212
  • Anahtar Kelimeler: alginic acid, poly(N-isopropyl acrylamide), interpolymeric association, responsiveness
  • Dokuz Eylül Üniversitesi Adresli: Hayır

Özet

In a previous study of ours,12 the interpolymeric associations based on alginic acid - poly(N-isopropyl acryl amide) (AgA/PNIPAM) were found to be more stable over the AgA/PNIPAM composition range of 15-70%/85-30%. The present study analyzes the dependence of phase transition temperature on the interpolymeric association composition and pH, by viscometric and spectroscopic measurements. The transition temperature determined over the 30-33 °C range showed a slight increase with increasing the AgA content, along with a possible synergistic effect between temperature and the ionic species within the solution, to which IPC is responsive.