| THEORY OF INTRAMOLECULAR ORIENTATIONAL ORDER OF MESOGENIC UNITS IN MC-LCPS AND ITS APPLICATION |
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| 作者姓名： | 王晓工 刘德山 周其庠 |
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| 作者单位： | Department of Chemical Engineering，Tsinghua University，Beijing，100084，Department of Chemical Engineering，Tsinghua University，Beijing，100084，Department of Chemical Engineering，Tsinghua University，Beijing，100084 |
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| 摘 要： | 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 LCPs with different length of flexible spacer was found and rationally related to even-odd zig-zag manner of transition properties The verification 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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| 收稿时间： | 1992-04-20 |
THEORY OF INTRAMOLECULAR ORIENTATIONAL ORDER OF MESOGENIC UNITS IN MC-LCPS AND ITS APPLICATION |
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| 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,1993,0(4):307-315. |
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| Authors: | WANG Xiaogong LIU Deshan ZHOU Qixiang |
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| Institution: | Department of Chemical Engineering; Tsinghua University; Beijing |
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| Abstract: | 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 LCPs with different length of flexible spacer was found and rationally related to even-odd zig-zag manner of transition properties The verification 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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| Keywords: | Liquid crystal polymer Intramolecular orientation order parameter Theory |
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