Abstract
Orientational ordering of four liquid-crystalline acrylates induced by the surface of KBr plates over a wide temperature range was studied by the IR dichroism technique. IR spectra of homogeneously aligned samples were used to calculate the angles between the direction of the transition moment for a series of vibrations of the mesogenic fragment and its long axis. A method for calculation of the homeotropic orientation parameter of molecules was proposed. The orientation parameters of homogeneously and homeotropically aligned samples in the nematic, smectic (A), and chiral smectic (I andH) phases were calculated. Thein situ photopolymerization of acrylates in the smectic phases occurs with retention of the orientational ordering in the polymer films formed.
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References
D. J. Broer,Mol. Cryst. Liq. Cryst., 1995,261, 513.
P. J. Shannon, W. M. Gibbons, and S. T. Sun,Nature, 1994,368, 532.
R. A. M. Hikmet,Macromolecules, 1992,25, 5759.
V. L. Khodzhaeva, I. I. Konstantinov, P. L. Magagnini, and E. L. Tassi,Vysokomol. Soedin., Ser. A, 1997,39, 1292 [Polym. Sci. Ser. A, 1997,39, 864 (Engl. Transl.)].
I. I. Konstantinov, F. Andruzzi, M. Paci, and P. L. Magagnini,Liq. Cryst., 1991,10, 207.
E. V. Angerer,Technische Kunstgriffe bei Physikalischen Untersuchungen, Friedr. Vieweg and Sohn, Braunschweig, 1959, 411 SS.
J. R. Fernandes and S. Venugopalan,Mol. Cryst. Liq. Cryst., 1976,35, 113.
R. D. B. Fraser,J. Chem. Phys., 1958,28, 1113.
R. Zbinden,Infrared Spectroscopy of High Polymers, Academic Press, New York-London, 1964, 307 pp.
W. Zwetkoff,Acta Physicochim. URSS, 1942,16, 132.
I. K. Bogatyreva, V. G. Avakyan, and V. L. Khodzhaeva,Izv. Akad. Nauk, Ser. Khim., 1995,44, 459 [Russ. Chem. Bull., 1995,44, 443 (Engl. Transl.)].
S. N. Abdullin and V. L. Furer,Zh. Prikl. Spektrosk., 1988,48, 421 [J. Appl. Spectrosc., 1988,48 (Engl. Transl.)].
L. J. Bellamy,Advances in Infrared Group Frequencies, Bungay, Suffolk, 1968, 213 pp.
P. Coulter and A. H. Windle,Macromolecules, 1989,22, 1129.
G. W. Gray and J. W. G. Goodby,Smectic Liquid Crystals, Leonard Hill, Glasgow-London, 1984, 246 pp.
A. I. Alexandrov, F. Andruzzi, I. I. Konstantinov, V. L. Khodzhaeva, P. L. Magagnini, M. Paci, T. V. Pashkova, and E. Tassi,Mol. Materials, 1997,9, 1.
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Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 319–323, February, 1999.
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Khodzhaeva, V.L., Konstantinov, I.I., Magagnini, P.L. et al. IR dichroism study of orientational ordering of liquid-crystalline acrylates. Russ Chem Bull 48, 318–322 (1999). https://doi.org/10.1007/BF02494556
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DOI: https://doi.org/10.1007/BF02494556