ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 23, Number 4
JKCSEZ 23(4)
August 20, 1979 

A simple method to calculate the interfacial tension between two immiscible molten polymers has been developed. The theory is based on the significant structure theory of liquids. The energy of adhesion is expressed as a geometric mean of the cohesion energies multiplied by correction factor (Φ12), ΔΕ12=Φ12√(ΔΕ11ΔΕ22). In the calculation of ΔΕ11 and ΔΕ22, a quasilattice of polymer chains has been assumed. It is assured that, besides the dispersion force, the polar force interactions between polymer constituent groups should be considered in the calculation of the interfacial tensions.