Abstract
A polystyrene-b-poly(methylmethacrylate) (PS-b-PMMA) modified with a fluorine-containing functional group at its chemical junction was designed to study the effect of the modified chemical junction on the microphase separation behavior. Various molecular weights of modified and unmodified PS-b-PMMA were synthesized, and effective χ parameter for them were estimated by small-angle X-ray scattering. The effect of the modified chemical junction was clearly observed in the measured effective χ parameters for the block copolymers below 200 of degree of polymerization. In contrast, the modified PS-b-PMMA over 200 of degree of polymerization showed quite similar behavior to the unmodified PS-b-PMMA.
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