PHASE-EQUILIBRIA IN BLOCK COPOLYMER HOMOPOLYMER MIXTURES

摘要: Phase equilibria in block copolymer (AB) + homopolymer (A) blends are considered theoretically the strong segregation limit. The effect of molecular weight is analyzed. In particular, following shown: (i) Long enough A-homopolymer chains (N(h) much greater than N(hc)) incompatible with stretched A-blocks so that and should be space separated any morphology. (ii) Interaction between micelles region N(h) N(hc) crucially depends on weight. For N(h)*. Separation system into two phases (block homopolymer) predicted as a result this attraction. (iii) Addition to an AB-copolymer minor results shifting regions stability cylindrical spherical morphologies toward more symmetric copolymers(smaller fraction major B-blocks). morphology matrix B-blocks could most favorable even if volume B-component nearly 50%.