Coarse-grained description of polymer blends as interacting soft-colloidal particles.

We present a theoretical approach which maps polymer blends onto mixtures of soft-colloidal particles. The analytical mesoscale pair correlation functions reproduce well data from united atom molecular dynamics simulations of polyolefin mixtures without fitting parameters. The theory exactly recovers the analytical expressions for density and concentration fluctuation structure factors of soft-colloidal mixtures (liquid alloys). © 2005 American Institute of Physics. [ABSTRACT FROM AUTHOR]