Abstract
In this paper, differential scanning calorimetry (DSC) was used to analyze the reaction kinetics of powder coatings. The effects of oxidized polyethylene wax (OPEW) on the curing process of powder coatings were investigated by exploring the curing process of OPEW-Owt% and OPEW-8wt% powder coatings. The Tg of OPEW-8wt% powder coating was 57.1 °C, which was greater than the Tg of OPEW-Owt% powder coating, indicating that OPEW increased the storage stability of the system. The apparent activation energy (Ea) of the two powder coatings was investigated by the Kissinger and Doyle-Ozawa equations. The Crane empirical equation was used to calculate the curing reaction order (n) of the two powder coatings, and the curing kinetics was discussed. The Ea of OPEW-0wt% was 64.35 kJ⋅mol-1, and the Ea of OPEW-8wt% was 60.95 kJ⋅mol-1, indicating that OPEW could promote the curing reaction.
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