Conformational transition of block copolymers in dilute solution and their morphology in the solid state

作者: Constantinos Tsitsilianis , George Staikos , Anastasios Dondos , Pierre Lutz , Paul Rempp

DOI: 10.1002/MACP.1990.021911009

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摘要: Block copolymers poly(methyl methacrylate)-block-polystyrene-block-poly(methyl methacrylate) and polystyrene-block-poly(tert-butyl were prepared by anionic polymerization studied in dilute solution as well the bulk state. The viscometric study revealed that block exhibit a conformational “transition” occurring narrow temperature range. Films obtained with same casting at different temperatures, chosen below above “transition”. From investigation of these films differential scanning calorimetry, using entropy relaxation method, dynamic mechanical measurements, it was shown rather segregated structure if they are temperature, adopt quasi-Gaussian conformation (implying better miscibility two kinds blocks) solvent is evaporated temperature.

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