Department of Chemical Engineering, Tarbiat Modares University, P.O. Box: 14115-143, Tehran, Iran
Abstract
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.
Haghtalab, A., Shojaeian, A., & Ebrahimiaqda, E. (2014). A New Segmental Local Composition Model for Calculation Thermodynamic Properties of Binary Polymer Solutions. Scientia Iranica, 21(6), 2087-2097.
MLA
Ali Haghtalab; Abolfazl Shojaeian; Elham Ebrahimiaqda. "A New Segmental Local Composition Model for Calculation Thermodynamic Properties of Binary Polymer Solutions". Scientia Iranica, 21, 6, 2014, 2087-2097.
HARVARD
Haghtalab, A., Shojaeian, A., Ebrahimiaqda, E. (2014). 'A New Segmental Local Composition Model for Calculation Thermodynamic Properties of Binary Polymer Solutions', Scientia Iranica, 21(6), pp. 2087-2097.
VANCOUVER
Haghtalab, A., Shojaeian, A., Ebrahimiaqda, E. A New Segmental Local Composition Model for Calculation Thermodynamic Properties of Binary Polymer Solutions. Scientia Iranica, 2014; 21(6): 2087-2097.
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