Abstract
The kinetics of triphenyl phosphine (TPP) catalyzed phenol‐epoxy reaction in the blend of 2,2′‐diallyl bisphenol A (DABA) and an epoxy novolac (EPN) was investigated using differential scanning calorimetry (DSC). The kinetic parameters viz., activation energy (E) and the pre‐exponential factor (A) were calculated by the multiple heating rate methods of Ozawa and Kissinger. The effect of catalyst concentration on the kinetic parameters of the cure reaction was studied and E and A were found to depend on catalyst concentration. The apparent activation energy values normalised to a fixed A value decreased systematically and the corresponding rates of reaction showed an increasing trend with increase in catalyst concentration. The iso‐conversional kinetic analysis done for different catalyst concentrations and for different conversion levels implied that the overall kinetics does not vary much with conversion level. The activation parameters were used to predict the cure profile of the resin under given conditions of temperature and catalyst concentration.
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