Abstract:

The aging process of the polyester powder coatings was studied by using UV accelerated aging in this paper. Different test techniques such as SEM, EDS, XPS and FT-IR were used to study the morphology change and group change of the polyester powder coatings during aging. The mechanism of the coating aging was also discussed. The test results showed that the polyester powder coatings had a strong photooxidation under the synergic action of ultraviolet light, oxygen, moisture and temperature. In addition, C—C, C—H and C—O of polyester powder coatings were oxidized to generate more C=O.

Key words: polyester, powder coating, UV aging, aging mechanism

摘要：

使用紫外光人工加速老化的方法研究了聚酯粉末涂料的老化过程,通过扫描电子显微镜(SEM)、能谱分析(EDS)、X射线光电子能谱分析(XPS)和红外光谱跟踪涂层老化过程羰基指数的变化,研究了聚酯粉末涂料在老化过程中涂层的形貌改变以及基团变化,探讨涂层老化的机理。测试结果表明:聚酯粉末涂层在紫外光、氧气、水分和温度的共同作用下发生剧烈的光氧化反应,C1s分峰拟合结果显示聚酯粉末涂层的C—C、C—H和C—O发生光氧化反应氧化生成了更多的C=O。

关键词: 聚酯, 粉末涂料, 紫外光老化, 人工加速老化, 老化机理

CLC Number: 

• TQ637.82