Abstract
The purpose of the present study is to see the effect of aging and solvent-vapor treatment on the viscoelasticity of star-shaped radial block copolymers. The pahse morphology determined by the viscoelasticity was compared with that of as-cast films on which we reported in the previous paper. By aging for 6 months, the submolecularly heterogeneous phase (SMHP) was segregated into each polystyrene and polybutadiene domain. The formation of pinched-in lamellae of polybutadine was accelerated by aging. According to the solvent-vapor treatment for aged films, the polystyrene and polybutadiene domains resultant from the SMHP by aging, were re-mixed. However, the formation of the pinched-in lamellae was further enhanced.
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Takigawa, T., Ohta, Y. & Masuda, T. The Effects of Aging and Solvent-Vapor Treatments on the Viscoelastic Properties of Star-Shaped Styrene-Butadiene Radial Block Copolymers. Polym J 22, 447–454 (1990). https://doi.org/10.1295/polymj.22.447
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DOI: https://doi.org/10.1295/polymj.22.447