IJERT-EMS
IJERT-EMS

Application of Image Analysis for Liquid Crystals Phase Transition Temperatures


Application of Image Analysis for Liquid Crystals Phase Transition Temperatures
Authors : L. N. V. H. Soma Sundar, K. Mallika, S. Sreehari Sastry, K. B. Mahalakshmi, Ha Sie Tiong,
Publication Date: 27-02-2017

Authors

Author(s):  L. N. V. H. Soma Sundar, K. Mallika, S. Sreehari Sastry, K. B. Mahalakshmi, Ha Sie Tiong,

Published in:   International Journal of Engineering Research & Technology

License:  This work is licensed under a Creative Commons Attribution 4.0 International License.

Website: www.ijert.org

Volume/Issue:   Volume. 6 - Issue. 01 , February - 2017

e-ISSN:   2278-0181

 DOI:  http://dx.doi.org/10.17577/IJERTV6IS020392

Abstract

Phase transition temperatures of schiff based liquid crystals: 3-hydroxy-4- {[(4-iodophenyl)imino ]methyl}phenyl alkanoates (Cn-1H2n-1COO-, n = 8 and 18) comprising terminal iodo substituent are identified using image analysis technique in conjunction with Polarizing Optical Microscope (POM). In this technique, the statistical parameters of 1st and 2nd kind are computed based on gray level intensities of liquid crystal textures as a function temperature. The changes in the intensities of liquid crystal textures as a function of temperature play a key role to identify the phases and phase transition temperatures. The sudden and abrupt changes like increments or decrements in the statistical parameters give the information to determine the transition temperatures of liquid crystals. The obtained results are in good agreement with literature.

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