Thirdly , order parameters , , of smectic - a phase can be expressed as this two kinds of elementary excitations and its expression is accomplished 第三，近晶a相的序参量， ，都可用上述两种元激发来表示，给出了表达式。
3.
When liquid crystal ( lc ) is in smectic - a ( sa ) phase , its molecules disperse in layers ( sandwich ) and the molecular long axis tropism is in some order and the director is perpendicular to the layers 液晶近晶a相，分子质心按层状分布(有层状结构) ，分子长轴取向有序，指向矢垂直于层面。用三个序参量， ，描述。
4.
Psc - 11 displays a nematic and two smectic enantiotropic mesophases , which are of interest for application in thermal controlling devices that might be turned on and off by external electric or magnetic regulation 这种性能应用于热控制装置很有意义，即可利用外界温度调节来开和关这一装置，这一性能在促进传递方面尚未见报导。
5.
5 , both melting point ( tm ) and isotropization temperature ( tj ) of all the three series compounds change regularly with the carbon numbers of the end alkoxy group increased . there is a gradual increase in smectic phase length and in the smectic - nemetic transition temperature . at the same time there is a gradual decrease in nemetic phase length 五，三个类型化合物16ia至16id 、 16ila至16lid 、 17ia至17id 、 17ila至17lid 、 18ia至18id和18ila至18lid的熔点和液晶态的清亮点均化合物分子中末端烷氧基增大逐渐降低；近晶相的温度范围和近晶相一向列相转变温度逐渐增大，而向列相的温度范围递减。
6.
Based on the understanding of netative poisson ratio mechanism and the characteristics of liquid crystalline polymers , the ability for the smectic liquid crystalline polymers possibly to bear the auxetic behavior was firstly proposed . at the same time the ideal molecular model was upbuilt and the calculation about the negative poisson ratio of smectic liquid crystalline polymers was theoretically carried out 经过对负泊松比产生机理和液晶高分子特征的理解，首次提出了近晶c相液晶高分子也具有产生npr效应的能力，建立了近晶c相液晶高分子产生负泊松比的分子模型，并且对其负泊松比进行了理论计算。
7.
2 , upon heating to their respective melting temperature , all the compounds above went to liquid crystal phase . the typical chiral smectic c phase lined texture and finger print texture , smectic fan texture and broken fan shaped texture , nematic schlieren texture schlieren texture and ball grandle texture , paramorphosis texture can be observed 实验结果表明：一，化合物2 、 4 、 16 、 17和18均具有热致液晶性；二，以上化合物加热至各自的熔点以上都能形成液晶态，在液晶态可以观察到新的席夫碱型液晶冠醚的合成与表征手性近晶c相的层线织构和指纹织构。
