Studies on Structure and Properties of Polymer Dispersed Cholesteric Liquid Crystals(Ⅲ)─The Morphology of Poly(MMA-CO-BMA) and ChN Mixtures

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (7): 1085.

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Studies on Structure and Properties of Polymer Dispersed Cholesteric Liquid Crystals(Ⅲ)─The Morphology of Poly(MMA-CO-BMA) and ChN Mixtures

LI An-Dong, SONG Xiang-Yu, ZHOU En-Le

Polymer Physics Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022

Received:1993-06-17 Revised:1993-11-01 Online:1994-07-24 Published:1994-07-24

Abstract

Abstract: The morphology of mixtures of poly(MMA-CO-BMA) with different composition and cholesteryl nonanoated(ChN)have been studied by X-ray diffraction, DSC, polarizing microscope and scanning electron microscopy.Three exothermic peaks were presented in the cooling DSCthermogram of mixtures, corresponding to the Ti-ch, Tch-s and Ts-k transitions.The optical microscope investigations of mesophases obtained by cooling the isotropic liquid of mixtures are shown that, the mixtures within a wider range of composition can form both Cholesteric and Smactic Aphase.The spherulite structure has been found at the temperature below Ts-k, for the mixtures with ChNcontent higher than 40%.The effects of the composition and concentration of copolymers on the crystalline and liquid crystalline textures have been discussed in detail.

Key words: Cholesterin liquid crystal, Polymer dispersed, Morphology, Optical texture

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LI An-Dong, SONG Xiang-Yu, ZHOU En-Le. Studies on Structure and Properties of Polymer Dispersed Cholesteric Liquid Crystals(Ⅲ)─The Morphology of Poly(MMA-CO-BMA) and ChN Mixtures[J]. Chem. J. Chinese Universities, 1994, 15(7): 1085.

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Studies on Structure and Properties of Polymer Dispersed Cholesteric Liquid Crystals(Ⅲ)─The Morphology of Poly(MMA-CO-BMA) and ChN Mixtures

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