Open AccessEffect of Oxidized Polyethylene Wax on Curing Process of Powder Coatings
Author(s) -
Wenxue Wang,
Yujue Wang,
Yuying Han,
Ziliang Liu,
Chuanxing Wang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/768/2/022034
Subject(s) - curing (chemistry) , differential scanning calorimetry , materials science , wax , activation energy , coating , powder coating , kinetics , polyethylene , order of reaction , composite material , chemical engineering , polymer chemistry , chemistry , reaction rate constant , organic chemistry , thermodynamics , physics , quantum mechanics , engineering
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 T g of OPEW-8wt% powder coating was 57.1 °C, which was greater than the T g of OPEW-Owt% powder coating, indicating that OPEW increased the storage stability of the system. The apparent activation energy (E a ) 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 E a 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.