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The Study of Cure Mechanism of a Fusion bonded Epoxy Powder Coating

Lu Zijie 1 Li Jin 1 Zhou Zhongquan 1 He Zhiduan 2 Zhang Lixin 1 Ke Wei 1 (1 Institute of Corrosion and Protection of Metals, the Chinese Academy of Sciences, Shenyang 110015, China) (2 Institute of Applied Chemistry, the Chinese Academy of Science  
The degree of cure (DOC) of a new type of epoxy/dicyandiamide powder coatings was detected by using solvent extraction on the free film cured at temperatures from 160℃to 230℃ for different time and the kinetic process was analyzed. The results revealed that the cure reaction yielded a single Arrhenius activation energy (91.4kJ/mol), which indicated that there might be only one overall reaction mechanism in the range of the temperature tested. The cure reaction of epoxy/ dicyandiamide powder system was complex, involving two principal reactions between epoxide and amine hydrogen, and between hydroxyl groups and —CN. The cure mechanism was also discussed.
【Fund】: 国家自然科学基金资助课题!595710 60
【CateGory Index】: TQ630.1
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