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Curing and thermal properties of novolak epoxy resins

F. MUSTATA1,* , I. BICU1

Affiliation

  1. Institute of Macromolecular Chemistry”P. Poni” Aleea Gr. Ghica Voda Nr.41 A, Iasi-700487, Romania

Abstract

Formaldehyde resins at various molar ratios of monomers p-aminophenol/cyclohexanone/p-nonylphenol/p-formaldehyde (p- AP/CHx/p-NF/p-FA) under acid catalysis have been obtained. The resulted resins were reacted with a large excess of epichlorohydrin and transformed in a multifunctional novolak epoxy resins. These resins were characterized by 1H-NMR, infrared spectroscopy and elemental analysis. The curing and thermal behaviour of these epoxy resin/ DDM systems were investigated using differential scanning calorimetry (DSC) and thermogravimetry (TG) techniques. The activation energies of the curing reactions are situated in the range of 54-75 kJ/mol. The cured products have good thermal properties, and activation energies of degradation reactions have values between 32 to 52 kJ/mol..

Keywords

Formaldehyde resin, Epoxy resins, Thermal properties, Curing behaviour.

Submitted at: Nov. 2, 2006
Accepted at: April 15, 2007

Citation

F. MUSTATA, I. BICU, Curing and thermal properties of novolak epoxy resins, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 4, pp. 931-935 (2007)