东南沿海气候条件对聚氨酯涂层老化行为影响研究  

Effects of Southeast Coastal Atmospheric Environment on Aging Behavior of Polyurethane Coating

作　　者：罗来正[1] 肖勇[1] 苏艳[1] 张燕[1] 黎小锋 冯利军[1] 王晓辉[1] 

机构地区：[1]西南技术工程研究所,重庆400039 [2]重庆綦江实验中学,重庆401420

出　　处：《装备环境工程》2015年第6期42-47,共6页Equipment Environmental Engineering

摘　　要：目的研究东南沿海高温、高湿、高盐雾、高辐射等恶劣气候环境对聚氨酯涂层老化行为的影响。方法通过在海南万宁开展聚氨酯涂层海洋大气环境暴露试验,从外观评级、光泽、色差、附着力、红外谱图等方面分析了涂层老化特征及老化原因。结果涂层在海洋大气环境下暴露4年,树脂大分子发生降解,主要官能团消失。结论海洋大气环境中紫外线的光降解和水的降解共同作用,导致了涂层失光-变色-粉化和附着力下降等宏观和微观缺陷的产生。Objective To investigate the influence of southeastern coastal atmospheric environment, which was hot, humid, salty, with high radiation, on the aging behavior of polyurethane coating. Methods Marine atmospheric exposure test of polyurethane coating was carried out in Wanning, Hainan. The aging characteristics and causes were analyzed from the appearance rating, gloss, color, adhesion, and infrared spectra. Results The coating resin fractured and main functional groups disappeared after marine atmospheric exposure test of polyurethane coating for four years.Conclusion Photodegradation by ultraviolet radiation together with degradation by water in marine atmosphere caused macroscopic and microscopic defects of the coating such as loss of light, color, pulverization and decrease of adhesion.

关 键 词：聚氨酯涂层 海洋大气环境 光降解 水降解 

分 类 号：TJ04[兵器科学与技术—兵器发射理论与技术] TG172.3[金属学及工艺—金属表面处理]