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smectic adj.1.【化學】碟狀液晶分子的,近晶的。2.凈化的。

smedley

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 實驗結果表明:一,化合物2 、 4 、 16 、 17和18均具有熱致液晶性;二,以上化合物加熱至各自的熔點以上都能形成液晶態,在液晶態可以觀察到新的席夫堿型液晶冠醚的合成與表征手性近晶c相的層線織構和指紋織構。

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 經過對負泊松比產生機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產生npr效應的能力,建立了近晶c相液晶高分子產生負泊松比的分子模型,并且對其負泊松比進行了理論計算。

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 五,三個類型化合物16ia至16id 、 16ila至16lid 、 17ia至17id 、 17ila至17lid 、 18ia至18id和18ila至18lid的熔點和液晶態的清亮點均化合物分子中末端烷氧基增大逐漸降低;近晶相的溫度范圍和近晶相一向列相轉變溫度逐漸增大,而向列相的溫度范圍遞減。

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 這種性能應用于熱控制裝置很有意義,即可利用外界溫度調節來開和關這一裝置,這一性能在促進傳遞方面尚未見報導。

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,分子質心按層狀分布(有層狀結構) ,分子長軸取向有序,指向矢垂直于層面。用三個序參量, ,描述。

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相的序參量, ,都可用上述兩種元激發來表示,給出了表達式。

Smectic liquid crystal 近晶相液晶