Dielectric and optical properties of polymer-liquid crystal composite |
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| Authors: | Rajiv Manohar G Tripathi AK Srivastava AK Prajapati |
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| Institution: | a Department of Physics, Lucknow University, 392, 5th Street, Rajendra Nagar, Lucknow 226006, India
b Applied Chemistry Department, Faculty of Technology and Engineering, The M.S. University of Baroda, P.B. No. 51, Kalabhavan, Vadodara 390 001, India |
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| Abstract: | Dielectric properties of polymer-liquid crystal mixture, having constituent polymer, poly-butyl methacrylate (PBMA) and liquid crystal, cholesteryl nonanoate, are reported as a function of frequency and temperature. The measurement has been done in a temperature range of 300-375 K and frequency range of 100 Hz-10 MHz. The dielectric permittivity and dielectric loss shows significant changes with the addition of polymer molecules in liquid crystal. The significant feature of composite formation is that the pure liquid crystal and polymer do not show dielectric relaxation in the frequency range covered, while the composite shows relaxation peak at a particular frequency. The optical transmittance of pure liquid crystal and composite has also been measured and compared. |
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| Keywords: | A Polymers D Phase transitions |
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