Scaling of interfacial properties in ternary polymer blends
Department of Materials Science and Engineering, Northwestern University,
Evanston, IL 60208, USA
2 CEA Service de Chimie Moléculaire, CE-SACLAY, 91191 Gif-sur-Yvette Cedex, France
Accepted: 11 March 1996
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 , and , L1 and L2, respectively, are calculated by solving the linearized equation resulting from minimizing σ as a function of the average composition of C, , with , and the net interaction per thermal energy between components A and B, . As 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.
PACS: 05.70.Fh – Phase transitions: general aspects / 64.75.+g – Solubility, segregation, and mixing
© EDP Sciences, 1996