Abstract
Halogenated epoxy resins of 1,1′bis(R,R′,4-hydroxy phenyl)cyclohexane (ECB: R = R′ = Cl; ECM: R = CH 3 and R′ = Cl and EBB: R = R′ = Br) were cured using 10–50% pyromellitic dianhydride (PMDA), tetrachlorophthalic anhydride (TCP), 1,1′-bis(4-amino phenyl) methane (DDM) and 1,1′-bis (4-amino phenyl) cyclohexane (DDC) as curing agents at 230/150 °C. PMDA and TCP cured resins are insoluble in common solvents while DDC and DDM cured resins are soluble. In order to understand degradation kinetics, TG–DTA of cured resins was carried out at the heating rate of 15 °C/min in nitrogen atmosphere. Resins are thermally stable up to about 300–360 °C and involved two-step decomposition reactions. Endo- or exothermic DTA transitions supported either chemical or physical changes.
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