Solubility profiles of poly(ethylene glycol)/solvent systems, I: Qualitative comparison of solubility parameter approaches


Ozdemir C., Guener A.

EUROPEAN POLYMER JOURNAL, cilt.43, ss.3068-3093, 2007 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 43 Konu: 7
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.eurpolymj.2007.02.022
  • Dergi Adı: EUROPEAN POLYMER JOURNAL
  • Sayfa Sayıları: ss.3068-3093

Özet

Solubility of systems involving four different molecular weights of poly(ethylene glycol) (PEG) in tetrahydrofuran (THF), chloroform, dimethylsulfoxide (DMSO), methanol and water have been investigated by different algorithmic approaches as the mathematical application of the "like dissolves like" principle. In this study, the solubility parameters and their components for PEG and solvents have been evaluated by using of atomic group contribution methods; Small, van Krevelen-Hoftyzer (VKH), Hoy and Breitkreutz methods, respectively. Then their 2-dimensional graphs (Bagley, Henry and Hoernschemeyer diagrams) and 3-dimensional graph (Hansen diagram) have been drawn by creating the solubility profiles of the polymer in selected solvents. The dissolving capability of these solvents has been discussed. In addition the solubility parameters have been calculated by use of the van der Waals volume in the selected molecule or repeating unit of the polymer instead of the molar volume which is used in atomic group contribution methods (Askadskii approach). Surface tensions of the polymer and solvent systems have been calculated with this method and solubility criteria of PEG have been explained after a serial calculation steps. In addition, influence of molecular weight of PEG on solubility has been also analyzed. As a consequence of algorithmic calculations, THF has been determined as the best solvent whereas water is found to be the weakest solvent for polymer/solvent systems. (c) 2007 Elsevier Ltd. All rights reserved.