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The UNIQUAC-NRF segmental interaction model for vapor-liquid equilibrium calculations for polymer solutions

Radfarnia, H. R ; Sharif University of Technology | 2005

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  1. Type of Document: Article
  2. Publisher: 2005
  3. Abstract:
  4. This paper presents a new segment-based thermodynamic model containing the combinatorial and energetic contributions to the excess Gibbs energy for correlating/predicting of the vapor-liquid equilibrium (VLE) of polymer solutions. The model is derived from the UNIQUAC-NRF model, recently proposed by Haghtalab and Asadollahi, following the idea to associate the nonideality of polymer-solvent mixture with polymer segment-solvent interaction parameters, Segment activity coefficients are calculated by means of the UNIQUAC-NRF model. At the present state of development, 16 binary segmental interaction parameters have been estimated, The capability of the model is demonstrated with successful representation of VLE correlation/prediction for 40 polymer-solvent systems. The model is capable of correlating predicting the VLE of polymer solutions with satisfactory accuracy and can provide a thermodynamic framework for calculating the VLE of polymer solutions using weakly temperature-dependent UNIQUAC-NRF parameters
  5. Keywords:
  6. Polymer solutions ; Polymer solutions segmental interaction UNIQUAC-NRF model vapor-liquid equilibrium calculation ; Polymer-solvent systems ; Gibbs free energy ; Phase equilibria ; Solutions ; Solvents ; Thermodynamics ; Polymers
  7. Source: Polimeri (Zagreb) ; Volume 26, Issue 3 , 2005 , Pages 115-120 ; 03511871 (ISSN)
  8. URL: https://www.academia.edu/77319487/The_UNIQUAC_NRF_Segmental_Interaction_Model_for_Vapor_Liquid_Equilibrium_Calculations_for_Polymer_Solutions?f_ri=3079142