Citation: WANG Xiaogong, LIU Deshan, ZHOU Qixiang. THEORY OF INTRAMOLECULAR ORIENTATIONAL ORDER OF MESOGENIC UNITS IN MC-LCPS AND ITS APPLICATION[J]. Chinese Journal of Polymer Science, ;1993, 11(4): 307-315. shu

THEORY OF INTRAMOLECULAR ORIENTATIONAL ORDER OF MESOGENIC UNITS IN MC-LCPS AND ITS APPLICATION

Received Date: 20 April 1992

New concepts such as intramolecular orientational order parameter and corresponding model as well as theory were proposed to describe the intramolecular orientation of mesogenic units in the liquid crystalline polymer chains. The relationship between the intramolecular orientational order parameter and the molecular geometrical parameters such as the bond angle, the bond rotational angle and the rotational potential energy of chemical bonds was deduced. A significant even-odd oscillation of the intramolecular orientational order parameter of LCPswith different length of flexible spacer was found and rationally related to even-odd zig-zag manner of transition properties.The venification and application of the theory are also discussed.The isotropic transition temperature predicted by the theory is shown to be in favourable agreement with the experiments.
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