Diagnosis

diagnosis journal

Volume 7 Issue 3

Synthesis of New Liquid Crystalline Diglycidyl Ethers

Issam Ahmed Mohammed and Rashidah Mohamed Hamidi
School of Industrial Technology, University Sains Malaysia, Penang 11800, Malaysia
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Abstract

The phenolic Schiff bases IVI were synthesized by condensation reactions between various diamines, namely o-dianisidine, o-tolidine and ethylenediamine with vanillin or p-hydroxybenzaldehyde and subsequent reactions between these phenolic Schiff bases and epichlorohydrin to produce new diglycidyl ethers IaVIa. The structures of these compounds were confirmed by CHN, FT-IR, 1H-NMR, and 13C-NMR spectroscopy. Their thermotropic liquid crystalline behavior was studied using differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). All the diglycidyl ethers prepared exhibit nematic mesophases, except for Va and VIa, which did not show any transition mesophases, but simply flow to liquids.
Keywords:synthesis; diglycidyl ether; schiff base; liquid crystal
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