Abstract
The simulated evolution of thin-film blends of immiscible AB diblock-copolymers and C homopolymers are presented and analyzed in terms of the time-dependent evolution of the three respective domains. In the current model, all polymer species are mutually incompatible, however the C homopolymers are considered to be less incompatible with the B-block of the diblock copolymer relative to the A-block, hence B-C interfaces develop rather than A-C interfaces. The collective phase-separation within these films leads to microdomains of the AB diblock copolymers along with macrodomains of C homopolymers, in which a growing disparity in domain length scales develops. Technologically, such films may be exploited to fabricate porous membranes with a bimodal distribution of through-thickness pore diameters.
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