A peculiar swelling behavior of polyacrylonitrile（PAN）－polymethyl acrylate（ＰＭＡ） copolymer film in a solvent of moderate dipole moment was studied using light scattering diffusivity of solvent, and differential scanning calorimetry(DSC), Since this polymer exibits clouding with formation of swelling domains, ｔhe rate of ｓｗｅlling ｗａｓ ｓｔｕｄｉｅｄ ｂｙ ｔｕｒbidity light scattering measurement. the rate increased with a constant ratio as a function of temperature irrespective of the kinds of solvent. The minimum temperature to observe clouding was measured as transition temperature (Tc) ｂｙ DSC. The rate of swelling and diffusivity of solvent depended on the differential temperature from Tc irrespective of the kinds of solvent.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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