DIPOLE-MOMENTS OF POLY(PARA-CHLOROSTYRENE) CHAINS DETERMINED IN BENZENE, ISOPROPYL BENZENE AND NORMAL-PROPYL BENZENE


YILMAZ F. , BAYSAL B.

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, cilt.30, ss.197-202, 1992 (SCI İndekslerine Giren Dergi)

Atıf İçin Kopyala
  • Cilt numarası: 30 Konu: 2
  • Basım Tarihi: 1992
  • Doi Numarası: 10.1002/polb.1992.090300208
  • Dergi Adı: JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
  • Sayfa Sayısı: ss.197-202

Özet

Dipole moments of poly (p-chlorostyrene) were determined from dielectric and refractive index measurements performed on their dilute benzene, isopropyl benzene and n-propyl benzene solutions over a wide range of temperatures. Experimental results are expressed in terms of the dimensionless dipole moment ratios, D(x) = [mu-2]/x-mu-0(2). The temperature coefficients of dipole moments, d ln[mu-2]/dT were calculated. The presence and importance of the specific solvent-segment interactions are demonstrated by considering the temperature dependence of the dipole moment ratio in the vicinity of the theta temperature. These results are compared with dipole moments and temperature coefficients which were calculated by Bahar et al. using the appropriate rotational isomeric state model to study the local solvent effect for the poly (p-chlorostyrene)-benzene system.