Synthesis and Physico-chemical Studies on Chalcone Based Epoxy Resin of (2E, 6E)-Bis (4-hydroxybenzylidene) cyclohexanone

By : K.M. Mital

Page No: 13-21

Abstract
Chalcone based epoxy resin (EBHBC) of (2E, 6E)- bis(4-hydroxybenzylidene) cyclohexanone (BHBC) was synthesized by condensing 0.5 mol BHBC and 2.5 mol epichlorohydrin in 500 mL isopropanol as a solvent and 1.0 mol NaOH in 50 mL water as a catalyst at 80o C. The structure of EBHBC is supported by spectral techniques. Molecular weights and molecular weight distribution of EBHBC were determined by gel permeation chromatography. DSC thermogram of EBHC showed one endothermic transition (146.1°C) and two endothermic transitions (253.52°C and 397.34°C) due to melting, some physical change and decomposition transitions, respectively. EBHBC is thermally stable up to about 300o C and followed two step degradation reactions. First step involved 21.2% weight loss over 300-390o C with temperature of maximum weight loss at 382°C. Similarly second step involved 39% weight loss over 390- 555°C with temperature of maximum weight loss at 418°C.

Authors:
Dharmesh B. Sankhavara, Jalpa Chopda, Jignesh P. Patel and P.H. Parsania
Department of Chemistry, Saurashtra University, Rajkot-360005, Gujarat, India

DOI: https://doi.org/10.32381/JPM.2019.36.01.2