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English
Published
: 2022-09-19
The synthesis of epoxy monomers with mesogenic groups
Abstract
A two-step synthesis was developed to prepare new types of diepoxy and diolefinic liquid crystalline (LC) monomers. The synthesis involved (i) esterification of 4-hydroxyphenyl-4-hydroxybenzoate or 4',4'-biphenol (I) with 4-pentenoic acid (II); (ii) epoxidation of the resulting diolefins with m-chloroperoxybenzoic acid. The structure of the resulting products was confirmed in terms of FTIR and ]H NMR spectra. A hot-stage polarizing microscope showed mesophases to occur in the monomers 2b, 3a and 3b (cf. scheme of reaction 1), but not in the product of esterification of I with II. Differential scanning calorimetry and thermooptical analysis were used to determine (crystal to mesomorphic (LC), and LC to isotropic) phase transition temperatures (Table 1, Fig. 1).
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Mossety-Leszczak, B., Wojciechowski, P., Galina, H., & Ulański, J. (2022). The synthesis of epoxy monomers with mesogenic groups. Polimery, 46(5), 374–376. Retrieved from https://polimery.ichp.vot.pl/index.php/p/article/view/2084
