期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2017
卷号：6
期号：2
页码：2272
DOI：10.15680/IJIRSET.2017.0602165
出版社：S&S Publications
摘要：In this paper, Thermo optical properties of two azomethine liquid crystals: 3-hydroxy-4-{[(4-iodophenyl)imino]methyl}phenyl alkanoates (Cn-1H2n-1COO-, n = 8,18) comprising terminal iodo substituent areinvestigated using image analysis technique in conjunction with Optical Polarizing Microscope. This investigationpurely based on intensities of the liquid crystal textures as a function of temperature. Thermo optical properties: Opticaltransmittance, Absorption coefficient, Birefringence, Phase retardation and Order parameter of the liquid crystals arecomputed by analyzing the textures of liquid crystals using MATLAB software. The obtained results show that, thelength of terminal chain length influences the thermo optical properties of the compounds. The lowest member of theazomethine liquid crystals: nABIA (n = 8), with respect to temperature exhibited the tunable birefringence by showingmore variations in the birefringence values of each wavelength with linearity compared to the highest member nABIA(n= 18) and the azomethine liquid crystal where n = 8 is more suitable for applications than the compound (n = 18)
关键词：Mesogens; image analysis; optical properties; birefringence; order parameter
