24. Phase-separated structures formed in polymer mixtures containing a thermotropic liquid crystalline copolyester as one component
writer：Akemi Nakai, Toshio Shiwaku, Wei Wang, Hirokazu Hasegawa, Takeji Hashimoto
keywords：thermotropic liquid crystalline copolyester
source：期刊
specific source：Polymer
Issue time：1996年
The composition dependence of the phase-separated structures in the polymer mixtures consisting of a thermotropic liquid crystalline (LC) copolyester (X-7G) and poly(ethylene terephthalate) (PET) was investigated by means of polarized light microscopy. For this purpose the mixtures were solution-cast into thin films, followed by isothermal annealing at 270 °C. Although the final structure was the LC droplets dispersed in the isotropic matrix for all mixtures, a variety of pattern-forming processes were observed, depending on the composition. For the mixtures with higher X-7G content, dewetting of the X-7G component on the surface of the glass substrate played an important role in the pattern formation.