| 环氧粉末涂料的固化机制研究 |
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| 引用本文： | 鲁自界,李劲,周钟泉,贺智端,张立新,柯伟.环氧粉末涂料的固化机制研究[J].材料开发与应用,2000,15(2):8-11. |
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| 作者姓名： | 鲁自界 李劲 周钟泉 贺智端 张立新 柯伟 |
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| 作者单位： | 1. 中国科学院金属腐蚀与防护研究所,金属腐蚀与防护国家重点实验室,沈阳,110015
2. 中国科学院长春应用化学研究所,长春,130022 |
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| 基金项目： | 国家自然科学基金资助课题!595710 60 |
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| 摘 要： | 用丁酮作萃取溶剂 ,研究了环氧 /双氰胺粉末涂层自由膜在 160～ 2 30℃温度下经不同时间固化后的萃取固化度 ,分析了涂膜固化反应的动力学过程。在研究温度范围内 ,固化反应表现出单一的表观激活能。环氧 /双氰胺粉末涂料的固化反应相当复杂 ,既有环氧基与胺基的加成反应 ,又有体系中羟基与氰基的聚合反应。文中讨论了固化反应机理 ,澄清了两种反应的相对作用
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| 关 键 词： | 环氧粉末涂料 萃取 固化机制 |
The Study of Cure Mechanism of a Fusion-bonded Epoxy Powder Coating |
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| Lu Zijie,Li Jin,Zhou Zhongquan,He Zhiduan,Zhang Lixin,Ke Wei.The Study of Cure Mechanism of a Fusion-bonded Epoxy Powder Coating[J].Development and Application of Materials,2000,15(2):8-11. |
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| Authors: | Lu Zijie Li Jin Zhou Zhongquan He Zhiduan Zhang Lixin Ke Wei |
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| Affiliation: | Lu Zijie 1 Li Jin 1 Zhou Zhongquan 1 He Zhiduan 2 Zhang Lixin 1 Ke Wei 1 |
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| Abstract: | 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. |
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| Keywords: | Epoxy powder coating Solvent extraction Cure mechanism |
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