Advertisement

Colloid Journal

, Volume 70, Issue 3, pp 268–273 | Cite as

Elastic properties of a nematic in a tetrapalladium organyl-pentadecane system

  • A. V. Golovanov
  • G. V. Ryabchuk
Article
  • 21 Downloads

Abstract

The temperature dependences of birefringence Δn, anisotropy of permittivity ɛa, and elastic constants K 11 and K 33 in the nematic phase of a tetrapalladium organyl-pentadecane system with a pentadecane content of 55 wt % have been investigated experimentally. It has been shown that, as temperature is elevated, ɛa, K 11, and K 33 values decrease and Δn remains unchanged. Elastic constants K 11 and K 33 have been established to vary from 3.4 × 10−7 to 5.6 × 10−6 dyn and from 1.3 × 10−6 to 27.4 × 10−5 dyn, respectively. The value of ɛa has been revealed to vary over the range 0.2–0.5. It has been found that, at temperatures above the N2 → Cr phase transition by 6°C, an imposed electric field induces the growth of tetrapalladium organyl crystals.

Keywords

Liquid Crystal Elastic Constant Colloid Journal Nematic Phase Pentadecane 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Sonin, A.S., Usp. Fiz. Nauk, 1987, vol. 153, p. 273; Izv. Akad. Nauk SSSR, Ser. Fiz., 1991, vol. 55, p. 1670; Izv. Akad. Nauk, Ser. Fiz., 1995, vol. 59, p. 4; Izv. Akad. Nauk, Ser. Fiz., 1998, vol. 62, p. 1610.Google Scholar
  2. 2.
    Usol’tseva, N.V., Liotropnye zhidkie kristally (Lyotropic Liquid Crystals), Ivanovo: Ivanovsk. Gos. Univ., 1994.Google Scholar
  3. 3.
    Mints, R.I. and Kononenko, E.V., Itogi Nauki Tekh., Ser. Biofiz., 1982, vol. 13.Google Scholar
  4. 4.
    Belyaev, V.V., Usp. Fiz. Nauk, 2001, vol. 171, p. 267.CrossRefGoogle Scholar
  5. 5.
    Blinov, L.M. and Chigrinov, V.G., Electro-Optics of Liquid Crystals, Berlin: Springer, 1994.Google Scholar
  6. 6.
    Usol’tseva, N., Praefcke, K., Singer, D., and Gundogan, B., Liq. Cryst., 1994, vol. 16, p. 601.CrossRefGoogle Scholar
  7. 7.
    Usol’tseva, N., Hauck, G., Koswig, H.D., et al., Liq. Cryst., 1996, vol. 20, p. 731.CrossRefGoogle Scholar
  8. 8.
    Kaznacheev, A.V., Praefcke, K., Sonin, A.S., and Usol’tseva, N.V., Kolloidn. Zh., 2002, vol. 64, p. 468.Google Scholar
  9. 9.
    Fraden, S., Hurd, A.J., Meyer, R.B., et al., J. Phys., Colloq., 1985, vol. 46, p. 85.CrossRefGoogle Scholar
  10. 10.
    Hurd, A.J., Fraden, S., Lonberg, F., and Meyer, R.B., J. Phys., 1985, vol. 46, p. 905.Google Scholar
  11. 11.
    Sonin, A.S., Vvedenie v fiziku zhidkikh kristallov (An Introduction to the Physics of Liquid Crystals), Moscow: Nauka, 1983.Google Scholar
  12. 12.
    Pikin, S.A., Strukturnye prevrashcheniya v zhidkikh kristallakh (Structural Transformations in Liquid Crystals), Moscow: Nauka, 1981.Google Scholar
  13. 13.
    De Gennes, P.G., The Physics of Liquid Crystals, Oxford: Clarendon, 1974.Google Scholar
  14. 14.
    Golovanov, A.V., Kaznacheev, A.V., and Sonin, A.S., Mol. Mater., 1993, vol. 3, p. 147.Google Scholar
  15. 15.
    Grebenkin, M.F. and Ivashchenko, A.V., Zhidkokristallicheskie materialy (Liquid Crystalline Materials), Moscow: Khimiya, 1989.Google Scholar
  16. 16.
    De Gennes, P.G., Physical Properties of Liquid Crystalline Materials, New York: Gordon and Breach, 1980.Google Scholar
  17. 17.
    Golovanov, A.V., Kaznacheev, A.V., and Sonin, A.S., Izv. Akad. Nauk, Ser. Fiz., 1996, vol. 60, p. 43.Google Scholar

Copyright information

© MAIK Nauka 2008

Authors and Affiliations

  • A. V. Golovanov
    • 1
  • G. V. Ryabchuk
    • 2
  1. 1.Nesmeyanov Institute of Organoelement CompoundsRussian Academy of SciencesMoscowRussia
  2. 2.Volgograd State Technical UniversityVolgogradRussia

Personalised recommendations