Self-consistent mean field theory of the microphase diagram of block copolymer/neutral solvent blends

Microphase diagrams of diblock copolymer/nonselective solvent blends were calculated via the numerical solution of the equations of the self-consistent, mean field theory of polymer blends. The focus was on the dependence of the equilibrium morphology on the relative degress of polymerization of the two blocks, the Flory interaction parameter and the overall polymer solvent concentrations. It was found that the resulting phase diagrams can all be mapped very nearly onto a common diagram, with microphase boundaries which depend primarily on the relative degrees of polymerization of the two blocks in the strong segregation regime