Influence of Temperature on Surface Tension of Liquid Crystals in the Cyanobiphenyl and Cyano-oxybiphenyl Series
Influence of Temperature on Surface Tension of Liquid Crystals in the Cyanobiphenyl and Cyano-oxybiphenyl Series
复制标题
温度对氰基联苯和氰基氧联苯系列液晶表面张力的影响
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
N. Demarquette
中科院分区：
文献类型：
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作者：
L. Gomes;N. Demarquette
摘要使用悬滴法，针对对应于材料的不同相的温度T，评估来自nCB和nOCB系列的低摩尔质量液晶的表面张力。除了呈现近晶相的材料，并且远离转变温度的表面张力被示出随着温度的升高而降低。在转变温度附近的温度和呈现近晶相的材料中观察到的非典型行为（表面张力γ和γ/γ/γ T的不连续性，向上跳跃和表面张力随温度升高而增加），根据分子的有序性进行了解释。
ABSTRACT The surface tension of low molar mass liquid crystals from the nCB and nOCB series was evaluated for temperatures, T, corresponding to the different phases of the materials, using the pendant drop method. With the exception of the materials which presented a smectic phase, and far from the transition temperatures the surface tension was shown to decrease with increasing temperature. The atypical behaviors (discontinuities of surface tension, γ, and of ∂γ/∂T, upward jump, and increase of surface tension with increasing temperature) that were observed for temperatures in the proximity of the transition temperatures and for the materials that presented a smectic phase, was explained in light of the ordering of the molecules.