Synthesis, Spectral and Thermal Study of Novel Epoxy Resins Based on Cardo Symmetric Double Schiff Bases

Abstract

Epoxy resins based on cardo symmetric double Schiff bases have been synthesized and characterized by IR, NMR, GPC, DSC and TGA at 10°C/min in nitrogen atmosphere. Resins are soluble in common solvents and thermally stable up to about 238–266°C and followed apparently two step degradation. Associated kinetic parameters such as E_a, A, n and ΔS* have been determined according to Freeman-Anderson method and discussed in light of structure of the resins. A considerably large amount of residue (22–30%) above 500°C confirmed the formation of cross-linked polymers.

Keywords:

• Cardo epoxy resin
• DSC
• GPC
• IR
• Kinetic parameters
• NMR
• Symmetric double Schiff bases
• TGA
• Thermal stability

ACKNOWLEDGMENTS

The authors are thankful to Directors RSIC, Chandigrah and SICART, V. V. Nagar for testing of the samples.