Solution properties of polyaniline

Yilmaz F., Kucukyavuz Z.

POLYMER INTERNATIONAL, cilt.59, sa.4, ss.552-556, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 59 Sayı: 4
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1002/pi.2736
  • Dergi Adı: POLYMER INTERNATIONAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.552-556
  • Anahtar Kelimeler: solution properties, static light scattering, dynamic light scattering, viscosity, conformation, MOLECULAR-WEIGHT POLYANILINE, LOW-TEMPERATURE SYNTHESIS, CONDUCTING POLYMERS, STATE, FILMS
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Solution properties of polyaniline (PANI) synthesized at various temperatures were studied using static light scattering (SLS), intrinsic viscosity, and dynamic light scattering (DLS). We demonstrated that average radius of gyration (R-g), intrinsic viscosity [eta], and average hydrodynamic radius (R-H), of polyaniline molecules in dilute N-methyl-2-pyrrolidinone (NMP) solutions increased with decreasing synthesis temperatures, i.e.; increasing molecular weight. SLS data demonstrate that second virial coefficient (A(2)) decreased with increasing particle sizes suggesting that solubility of PANI in NMP decreased with increasing particle sizes. We also find that the polymers extend as the polymer concentration is lowered and that the increase in the hydrodynamic radius can be expressed by a power law of the electrostatic screening length. This behavior is typical of polyelectrolytes in dilute solution, providing a basis for understanding the conformation changes of this metallic polymer in solution. (C) 2009 Society of Chemical Industry