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利用统计物理方法讨论了自由能 ,在此基础上 ,详细地推导了只考虑二阶和三阶维里系数近似下 ,刚性棒状分子的液晶统计理论。介绍了液晶的序参量 ,讨论了由序参量描述的液晶统计理论。简要地介绍了液晶的相变理论。最后从统计理论出发讨论了液晶的弹性系数与序参数的关系。
The free energy is discussed by means of statistical physics. On this basis, the liquid crystal statistical theory of rigid rod-like molecules considering only second-order and third-order virial coefficients is deduced in detail. The order parameters of liquid crystal are introduced, and the theory of liquid crystal described by order parameter is discussed. The phase transition theory of liquid crystal is introduced briefly. Finally, from the statistical theory, the relationship between the elastic coefficient and the order parameter of the liquid crystal is discussed.