Influence of block lengths and symmetries of block copolymers on phase behavior of polymer A/polymer B/block copolymer ternary blends

摘要

Monte Carlo simulations were used to investigate the compatibilizing effects of diblocks copolymers in A/B/A-B diblock copolymer ternary blends and triblock copolymers in A/B?triblock copolymer ternary blends,respectively.The volume fraction of homopolymer A was 19% and was the dispersed phase.The simulation results show that diblock copolymers with longer A-blocks are more efficient as compatibilizers,and symmetric triblock copolymers with a shorter middle block length are easily able to bridge each other through the association of the end blocks.This kind of trtiblock copolymers have realtively high ability to retard pahse separation as compatibilizers.