Swelling of polyacrylamide gels in polyacrylamide solutions

Kayaman N., Okay O., Baysal B.

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, cilt.36, sa.8, ss.1313-1320, 1998 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 36 Sayı: 8
  • Basım Tarihi: 1998
  • Dergi Adı: JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1313-1320
  • Anahtar Kelimeler: swelling, polyacrylamide gels, swelling in polymer solutions, polymer-polymer interaction parameter, RUBBER-ELASTICITY THEORY, POLYMER NETWORKS, POLY(ACRYLIC ACID), POLY(METHYL METHACRYLATE), BEHAVIOR, COMPLEXATION, COLLAPSE, EQUILIBRIUM, COPOLYMERIZATION, FLUORESCENCE
  • Marmara Üniversitesi Adresli: Hayır

Özet

Swelling behavior of polyacrylamide (PAAm) and polyacrylamide-co-polyacrylic acid (PAAm-co-PAAc) gels was investigated in aqueous solutions of monodisperse PAAms with molecular weights ((M) over bar(w)) ranging from 1.5 x 10(3) to 5 x 10(6) g/mol. The volume of the gels decreases as the PAAm concentration in the external solution increases. This decrease becomes more pronounced as the molecular weight of PAAm increases. The classical Flory-Huggins (FH) theory correctly predicts the swelling behavior of nonionic PAAm gels in PAAm solutions. The polymer-polymer interaction parameter chi(23) was found to decrease as the molecular weight of PAAm increases. The swelling behavior of PAAm-co-PAAc gels in PAAm solutions deviates from the predictions of the FH theory. This is probably due to the change of the ionization degree of AAc units depending on the polymer concentration in the external solution. (C) 1998 John Wiley & Sons, Inc.