Abstract
The effects of chain size and architectural asymmetry on the miscibility of blendswith chemically identical monomers, differing only in their molecular weight andarchitecture, are studied via Monte Carlo simulation by using the bond fluctuationmodel. Namely, we consider blends composed of linear/linear, star/linear andstar/star chains. We found that linear/linear blends are more miscible than thecorresponding star/star mixtures. In star/linear blends, the increase in the volume fractionof the star chains increases the miscibility. For both star/linear and star/starblends, the miscibility decreases with the increase in star functionality. When weincrease the molecular weight of linear chains of star/linear mixtures the miscibilitydecreases. Our findings are compared with recent analytical and experimentalresults.
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