液晶分子理论

本文从修改了的Kobayashi-McMillan哈密顿量出发,(1)在平均场近似下计算了长棒形液晶分子的相图;(2)计算了取向关联函数;(3)对Muta等的同系物液晶磁双折射实验结果做了分析处理,并首次给出了同系物液晶磁双折射实验的定性解释;(4)计算表观指数Δ,得到Δ=1.40;(5)提出了一种与Marcelja关于液晶奇偶效应理论不同的新解释,并首次计算了过冷温度T^*的奇偶效应。 关键词：

MOLECULAR THEORY OF LIQUID CRYSTALS

Starting from a modified Kobayashi-McMillan hamiltonian, (1) phase diagrams of liquid crystals of long molecules are calculated in the mean field approximation; (2) orientation correlation functions are calculated; (3) magnetic birefringence experimental results (of Muta et al.) on homologous series are analysed and explained qualitatively for the first time; (4) apparent exponent △ is calculated and △ = 1.40 is obtained; (5) a new explanation of the even-odd effect of liquid crystals differing from that of Marcelja is proposed. The even-odd effect of supercooling temperature T^* is calculated for the first time.