Compatibilization of Polymer-Polymer Interfaces with Copolymers: Sequence Distribution and Molecular Weight Effects (To be submitted)

TitleCompatibilization of Polymer-Polymer Interfaces with Copolymers: Sequence Distribution and Molecular Weight Effects (To be submitted)
Publication TypeJournal Article
Year of Publication2009
AuthorsWaldow, Dean, Wolbrecht Steven, and Dadmun Mark
Abstract

Copolymer additives of different molecular weights and structures in a polymer blend were studied using Monte Carlo simulations with a focus on the phase separated interface. The copolymers migrate to the interface with molecular weight having only modest affect. The shape of the copolymers at the interface was a strong function of their structure with most copolymers spread out oblate along the interface while the diblocks became prolate protruding into the two phases. The copolymer volume was also dependent on the copolymer structure with larger copolymers experiencing an increase in their volume with quench depth whereas the random copolymer experienced a reduction in volume. The aggregate results suggest that ran-block copolymers show strong potential as effective compatibilizers for polymer blends.