太さの異なる棒状高分子の二成分混合系におけるスメクチック-スメクチック相分離

抄録

The binary systems of mono-disperse hard-rod-like particles with different diameters have been predicted to segregate into smectic phases by the numerical experiments and computer simulations. This segregation is entropically driven based on the steric repulsion between particles. In this study, we present an experimental finding of the predicted segregation by atomic force microscopy (AFM) observations 　　and synchrotron radiation small- and wide- angle X-ray scattering measurements (SR-SAXS and SR-WAXS) in the thermotropic LC systems of the binary mixtures of the polysilanes with different alkyl side chain length, Poly{n-tridecyl-(S)-2-methylbutylsilane}, Poly{n-dodecyl-(S)-2-methylbutylsilane}, Poly{n-undecyl-(S)-2-methylbutylsilane} and Poly{n-decyl-(S)-2-methylbutylsilane}, which can be regarded as rods with different diameters.