Tytuł artykułu
Autorzy
Identyfikatory
Warianty tytułu
Języki publikacji
Abstrakty
Linear electric susceptibility and nonlinear dielectric effect (NDE) of the isotropic phase of the benzene solutions of 4-heptyl-4_-cyano-biphenyl (7CB4) are described in the whole concentration and temperature ranges. At the molar fraction above 0.85 strong, critical pre-transitional effects are observed, associated with the imminent nematic phase. The effects of the molecular reorientation and dipolar association, the latter manifesting itself by positive NDE and near the transition to the solid phase with a strong negative NDE, are taken into account. Otherwise, critical fluctuations occurring near the nematic phase transition lead to a strong, critical increase of the electric susceptibility change in electric field. The observed effects, with supplementary optical and microscopic studies, allow an accurate determination of the temperatures of phase transitions and setting up the phase diagram of these solutions.
Wydawca
Czasopismo
Rocznik
Tom
Strony
435--441
Opis fizyczny
Bibliogr. 23 poz., rys.
Twórcy
autor
- Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, PL 60-179 Poznań, Poland
autor
- Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, PL 60-179 Poznań, Poland
Bibliografia
- 1.Karat P.P. and Madhusudana N.V., Mol. Cryst. Lig. Cryst., 36, 51 (1976).
- 2.De Jeu W.H., Physical Properties of Liquid Crystalline Materials, Gordon and Breach, 1980.
- 3.Drozd-Rzoska A., Phys. Rev. E, 59, 5556 (1999).
- 4.Bradshaw M.J. and Raynes E.P, Mol. Cryst. Lig. Cryst, 91,145 (1983).
- 5.Van der MeerB.W., Postma F., Dekker A.J. and De Jeu W.H., Mol. Phys., 45,1227 (1982).
- 6.Kędziora R and Jadżyn J., Lig. Cryst, 8,445 (1990).
- 7.Toriyama K. and Dunmur D.A., Mol. Cryst Lig. Cryst, 139, 123 (1986).
- 8.Małecki J., J. Chem. Soc. Farad. II, 72, 104 (1976).
- 9.Bottcher C.F., Theory of Electric Polarization,Elsevier, Amsterdam, 1973.
- 10.Piekara A., Proc. Roy. Soc, 172, 360 (1939).
- 11.Rzoska S.J., Chrapeć J. and Zioło J., J. Phys. Chem., 92,2064 (1988).
- 12.Rzoska S.J.,Phys. Rev., E48,1136 (1993).
- 13.MałeckiJ. and Zioło J., Chem. Phys., 68, 83 (1978).
- 14.Drozd-Rzoska A. and Rzoska S.J., Mol. Cryst. Lig. Cryst, 330, 29 (1999).
- 15.Rzoska S.J. and Zioło J., Lig. Cryst, 17, 629 (1994).
- 16.Małecki J. and Nowak J., J. Mol. Lig., 71,11 (1997).
- 17.Małecki J., J. Chem. Soc. Farad. II, 72, 1214 (1976).
- 18.Małecki J., Electrochim. Acta, 33, 1233 (1988).
- 19.De Gennes R.G. and Prost J., Physics of Liquid Crystals, Oxford, Claredon Press, 1993.
- 20.Drozd-Rzoska A., Rzoska S.J. and Zioło J., Phys. Rev., E54, 6452 (1996).
- 21.Dunmur D.A. and Tomes E.A., Mol. Cryst. Lig. Cryst, 76,231 (1981).
- 22.MutaK., Takezoe H., Fukuda A. and Kuze E., Japan J. Appl. Phys., 18,2073 (1979).
- 23. Małecki J.A. and Nowak J., J. Mol. Liquids, 81,245 (1999).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ1-0020-0045