Abstract
The curing of the neat unsaturated polyester resin (UP) with benzoyl peroxide (initiator) as well as the curing of UP modified with two poly(e-caprolactone) PCL samples (PCL2 and PCL50) of different molecular masses (M n=2⋅103 and M n=5⋅104, respectively), were investigated by non-isothermal differential scanning calorimetry (DSC), at different heating rates. The activation energy was determined from the variation of the peak exotherm temperature, T peak, upon heating rate. Besides, the degree of conversion (α) was obtained from isothermal DSC measurements at 80°C at different curing times for neat UP, UP+ PCL2 and UP+PCL50. Kinetic parameters were deduced assuming the n th order reaction kinetic model for neat UP, UP+PCL2 and UP+PCL50 systems.
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