%0 Journal Article
%T A New Segmental Local Composition Model for Calculation Thermodynamic Properties of Binary Polymer Solutions
%J Scientia Iranica
%I Sharif University of Technology
%Z 1026-3098
%A Haghtalab, Ali
%A Shojaeian, Abolfazl
%A Ebrahimiaqda, Elham
%D 2014
%\ 12/01/2014
%V 21
%N 6
%P 2087-2097
%! A New Segmental Local Composition Model for Calculation Thermodynamic Properties of Binary Polymer Solutions
%K polymer solution
%K Segmental-Wilson-Non Random Factor
%K local composition model
%K vapor-liquid equilibrium
%K Excess enthalpy
%R
%X A new local composition model, Segmental-Wilson Non-Random Factor (S-Wilson-NRF), based on volume fraction is developed. The new activity coefficient model consists of combinatorial and residual terms that the combinatorial Flory-Huggins equation and the S-Wilson-NRF function are used for the entropy and enthalpy terms, respectively. This model for non-polymeric systems reduces to Nonelectrolyte-Wilson-NRF model. The present model with two dependent adjustable energy parameters is applied to correlation of the activity of solvent for 24 binary polymer systems at various number-average molar masses of polymer and temperatures. Moreover, the results of the present model are compared with the other local composition models such as Nonrandom Two-Liquid (NRTL), NRTL-Nonrandom Factor (NRTL-NRF) models and the Flory-Hugginsmodel. Finally, the new model is applied for correlation of the excess molar enthalpy of the binary polymer solutions at the different conditions. As a conclusion, the results of the new model are in good agreement with the experiment.
%U http://scientiairanica.sharif.edu/article_3602_4cdb9722937a759b244b09635fe53188.pdf