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Proceedings Paper

Synthesis of liquid crystalline epoxy monomers
Author(s): J. Fabia; H. Galina; B. Mossety-Leszczak; J. Ulanski; Piotr Wojciechowski; Andrzej Wlochowicz
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Paper Abstract

A two-stage method of synthesis of liquid-crystalline diepoxy monomers has been developed. In the first stage, esterification of 4-hydroxyphenyl-4-hydroxybenzoate or 4,4'- biphenol or 4,4'-dihydroxyazobenzene was carried out using 4-penetenoic acid. The resulting olefinic precursors were oxidized with m-chloroperoxybenzoic acid to introduce the epoxy groups. The structure of products was confirmed by FT- IR and 1H NMR. Examinations on a polarization microscope with a hot plate confirmed the presence of mesomorphic phases in both the precursors and monomers. The phase transition temperatures were in the range of 73.5 (at cooling) to 128.0 degree(s)C for olefinic precursors and in the range 57.1 (at cooling) to 143 degree(s)C for epoxy compounds, as determined by DSC and thermo-optical analysis (TOA).

Paper Details

Date Published: 27 June 2002
PDF: 7 pages
Proc. SPIE 4759, XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications, (27 June 2002); doi: 10.1117/12.472123
Show Author Affiliations
J. Fabia, Technical Univ. of Lodz (Poland)
H. Galina, Rzeszow Univ. of Technology (Poland)
B. Mossety-Leszczak, Rzeszow Univ. of Technology (Poland)
J. Ulanski, Technical Univ. of Lodz (Poland)
Piotr Wojciechowski, Technical Univ. of Lodz (Poland)
Andrzej Wlochowicz, Technical Univ. of Lodz (Poland)

Published in SPIE Proceedings Vol. 4759:
XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications
Jolanta Rutkowska; Stanislaw J. Klosowicz; Jerzy Zielinski, Editor(s)

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