Comparison of the intrinsic viscosity and inverse gas chromatography techniques in determination of the exchange enthalpy and entropy parameters

Yılmaz F., Cankurtaran O.

POLYMER, cilt.38, ss.3539-3543, 1997 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 38
  • Basım Tarihi: 1997
  • Doi Numarası: 10.1016/s0032-3861(96)00914-7
  • Dergi Adı: POLYMER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.3539-3543
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

The chi(1)-interaction parameters of poly(dimethyl siloxane) with methyl ethyl ketone at very low polymer concentration were determined by means of intrinsic viscosity (IV) measurements at several temperatures. The chi(t)(infinity)-total interaction parameters of the same system at infinitely high polymer concentration were also determined using inverse gas chromatography (i.g.c.) technique around the same temperature range. Then, exchange enthalpy, X-12, and entropy, Q(12), parameters in the Flory's equation of state theory were determined from the obtained interaction parameters. Both X-12 and Q(12) parameters obtained by TV are lower than those found by i.g.c.. (C) 1997 Elsevier Science Ltd.