Skip to main content
SpringerLink
Log in

Dielectric and electro-optical properties of polymer-stabilized liquid crystal. II. Polymer PiBMA dispersed in MBBA

  • Published:
Applied Physics A Aims and scope Submit manuscript

Abstract

In continuation of our earlier work (Pande et al. in Appl Phys A 122:217–226, 2016), we report the results of dielectric and electro-optical properties of pure MBBA and PSLC (polymer PiBMA dispersed in MBBA) systems. The polymer networks domains formed are found to be anisotropic and are oriented in the direction of electric field for both the planar and homeotropic alignment cells. The dielectric anisotropy, optical anisotropy, response time, threshold voltage, splay elastic constant and rotational viscosity were observed for both the LC and PSLC systems with electric field. The liquid crystal properties are affected significantly with increasing concentration of polymer in pure LC material. It has been observed that the polymer networks interaction plays a major role in changing the properties of PSLC system. The effect of dielectric loss and dielectric permittivity on both pure LC and PSLC systems is also discussed.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12

Similar content being viewed by others

References

  1. M. Pande, P.K. Tripathi, A.K. Mishra, S. Manohar, R. Manohar, S. Singh, Dielectric and electro-optical properties of polymer stabilized liquid crystal system. Appl. Phys. A 122, 217–226 (2016)

    Article  ADS  Google Scholar 

  2. S. Kaur, A.K. Thakur, S.S. Bawa, A.M. Biradar, Behaviour of Goldstone and soft mode at Tc in ferroelectric liquid crystals. Phys. B 344, 133–139 (2004)

    Article  ADS  Google Scholar 

  3. M. Pande, P.K. Tripathi, S.K. Gupta, R. Manohar, S. Singh, Enhancement of birefringence of liquid crystals with dispersion of poly (n-butyl methacrylate) (PBMA). Liq. Cryst. 42, 1465–1471 (2015)

    Article  Google Scholar 

  4. K.S. Cole, R.H. Cole, Dispersion and absorption in dielectrics I: alternating current characteristics. J. Chem. Phys. 9, 341–345 (1941)

    Article  ADS  Google Scholar 

  5. M.B. Pandey, R. Dhar, A.S. Anchalkumar, C.V. Yelamaggad, Characteristic dielectric behaviour of the wide temperature range twist grain boundary phases of unsymmetrical liquid crystal dimers. J. Phys. Condens. Matter 19, 436919 (2007)

    Google Scholar 

  6. S.C. Jain, R.S. Thakur, S.T. Lakshmikumar, Switching response of a polymer dispersed liquid crystal composite. J. Appl. Phys. 73, 374437–374448 (1993)

    Google Scholar 

  7. S. Pandey, S.K. Gupta, D.P. Singh, T. Vimal, P.K. Tripathi, A. Srivastava, R. Manohar, Effects of polymer doping on dielectric and electro-optical parameters of nematic liquid crystal. Polym. Eng. Sci. 55, 414–420 (2015)

    Article  Google Scholar 

  8. J. Sun, S.T. Wu, Recent advances in polymer network liquid crystal spatial light modulators. J. Polym. Sc. Part B Polym. Phys. 52, 183–192 (2014)

    Article  ADS  Google Scholar 

  9. S.V. Shiyanovskii, O.D. Lavrentovich, Dielectric relaxation and memory effects in nematic liquid crystals. Liq. Cryst. 37, 737–745 (2010)

    Article  Google Scholar 

  10. D.A. Dunmur, M.R. de la Fuente, M.A. Perez Jubindo, S. Diezc, Dielectric studies of liquid crystals: the influence of molecular shape. Liq. Cryst. 37, 723–736 (2010)

    Article  Google Scholar 

  11. O. Sato, N. Iwata, T. Kasai, Y. Tsujii, S. Kang, J. Watanabe, M. Tokita, Nematic liquid crystal anchoring strengths of high density polymer brush surfaces. Liq. Cryst. 42, 181–188 (2015)

    Article  Google Scholar 

  12. W. Maier, A.Z. Saupe, Phys. Chem. 6, 327 (1956)

    Google Scholar 

  13. Z. Ran, H. Jun, P.Z. Hui, X. Li, Calculating the dielectric anisotropy of nematic liquid crystals: a reinvestigation of the Maier-Meier theory. Chin. Phys. B 18, 2885 (2009)

    Article  ADS  Google Scholar 

  14. J.I. Fukuda, Stabilization of blue phases by the variation of elastic constants. Phys. Rev. E 85, 029903 (2012)

    Article  ADS  Google Scholar 

  15. C. Blanc, D. Svensek, S.Z. Umer, M. Nobili, Quantum Spin Hall Effect in Graphene. Phys. Rev. Lett. 95, 09780 (2005)

    Article  Google Scholar 

  16. Y.H. Lin, H.C. Lin, J.M. Yang, A Polarizer-Free Electro-Optical Switch Using Dye-Doped Liquid Crystal Gels. Materials 2(4), 1662–1673 (2009)

    Article  ADS  Google Scholar 

  17. H.W. Ren, Y.H. Fan, S.T. Wu, Tunable Fresnel lens using nanoscale polymer-dispersed liquid crystals. Appl. Phys. Lett. 83, 1515 (2003)

    Article  ADS  Google Scholar 

  18. D. Culelli, G. De Filpo, G. Chidichimo, F.P. Nicoletta, Photoswitching in polymer-dispersed liquid crystals. J. Appl. Phys. 100, 024508 (2006)

    Article  ADS  Google Scholar 

  19. L.M. Blinov, V.G. Chigrinov, Electro-optic effects in Liquid Crystal Materials (Springer, New York, 1994)

    Book  Google Scholar 

  20. S. Singh, Liquid Crystals Fundamentals (World Scientific Publishing Pub Co Inc., Singapore, 2002)

    Book  Google Scholar 

Download references

Acknowledgments

PKT is thankful to UGC, New Delhi, for providing grant of Dr. D.S. Kothari Postdoctoral Fellowship No. F.4-2/2006 (BSR)/PH/13-14/0080 and SS to DST New Delhi for the financial support. We are thankful to Prof. R. Manohar (University of Lucknow) for providing experimental facilities.

Author information

Authors and Affiliations

  1. Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221 005, India

    Pankaj Kumar Tripathi, Mukti Pande & Shri Singh

Authors
  1. Pankaj Kumar Tripathi
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Mukti Pande
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Shri Singh
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Shri Singh.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Tripathi, P.K., Pande, M. & Singh, S. Dielectric and electro-optical properties of polymer-stabilized liquid crystal. II. Polymer PiBMA dispersed in MBBA. Appl. Phys. A 122, 847 (2016). https://doi.org/10.1007/s00339-016-0376-1

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s00339-016-0376-1

Keywords

Search

Navigation