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IJSTR >> Volume 2- Issue 5, May 2013 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Optical Study Of Polymer Dispersed Mixed Liquid Crystals

[Full Text]

 

AUTHOR(S)

Rita A.Gharde, Jyoti R. Amare, Santosh A. Mani

 

KEYWORDS

Keywords: Polymer Dispersed Liquid Crystals (PDLCs), Polarizing Microscopy Study (PMS), Refractive Index (R.I)

 

ABSTRACT

ABSTRACT: Recently, Liquid Crystal (LC) dispersed with polymer is used to enhance the physical properties of the LCs materials. These materials possess combined application of LC and polymer and their electro-optic applications have been extensively studied during last decades. The LC mixture consists of Nematic and Cholestric that are dispersed in a monomer or prepolymer with different concentration. The existing Polymer Dispersed Liquid Crystal (PDLC) consists of different concentrations of LC and monomer. The textures and Phase transition temperature (PTTs) can be studied by Polarising Microscope Studies (PMS). The Phase transition temperature (PTTs) can also be studied by Fabry-Perot etalon Scattering Studies (FPSS) In this paper, we present the changes in transition temperature along with new phase transition temperature in PDLC. Measurements were performed for both heating and cooling of various samples. In addition to this, Refractive Index (RI) of all samples were found for optical characterization of the material. Texture observation and spectroscopic techniques are used to characterize the other properties of the PDLC samples. The PDLC suspension can be used as a new liquid crystalline material that does not require any additional alignment processing or treatment. Our results will provide new opportunity and their uses in advanced technology development.

 

REFERENCES

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[2]. "Phase Transition Temperatures of Liquid Crystals Using Fabry-Perot Etalon" Molecular Crystals & Liquid Crystals; vols364-368 (2001) S. J. Gupta, R. Gharde & A. Tripathi.


[3]. “Fabry Perot Scattering Studies of Mixtures of Cholesteryl Liquid Crystals“,Gupta Sureshchandra J.,Rita A. Gharde,et.al,Journal of Optics,Vol.34 No.2,ISSN 0972-8821,pg.82,April-June2005

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[10]. “Effect of Light on Nematic Liquid Crystal,” Rita Gharde and Sangeeta Thakare AIP Conf. Proc. 1391, pp. 86-88; doi:10.1063/1.3646787

[11]. “ Phase Transition of Liquid Crystal doped with Nanopowder”,R.A Gharde, S.V. Phonde ,at International conference on Nanomaterials and Nanotechnology ,NANO 2010 Dec 13-16 ,2010,IUPAC.Macmilan Publisher India Limited

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