We analyze interfaces between A-righ and B-rich phases in symmetric ternary polymer blends with a non-selective C minority component. The interfacial tension σ and the interfacial thicknesses of the composition profiles of φA(cursive Greek chi) - φB(cursive Greek chi), and φC(cursive Greek chi), L1 and L2, respectively, are calculated by solving the linearized equation resulting from minimizing σ as a function of the average composition of C, φ̄C = 1 - φ̄, with φ̄/2 = φ̄A = φ̄B&, and the net, interaction per thermal energy between components A and B, χAB = χ (χAC = χBC = ηχ). As φ̄C increases the interfacial thickness increases and the interfacial tension decreases. Our results are in excellent agreement with the steady-state solution of the non-linear spinodal decomposition equations.
ASJC Scopus subject areas
- Physics and Astronomy(all)