FREE-ENERGY OF MIXING OF A BINARY POLYMER-SOLUTION

Polymer solutions are simulated by Monte Carlo method on the cubic lat tices. The effect of the energy of interaction between components on t hermodynamic characteristics of polymeric blend (free energy, enthalpy and entropy of mixing) are investigated. Expressions for the free ene rgy, enthalpy and entropy of interaction are obtained taking into acco unt a relation between the number of intermolecular contacts and the e nergy of intermolecular interaction. The entropy of mixing is establis hed to depend on the pairwise interaction parameter as it is in the ca se of low-molecular-mass solutions. The results are compared to the cl assical Flory-Huggins theory.