醇酸体系和聚氨酯体系人工老化测试分析  

Artificial Weathering Tests of Alkyd and Polyurethane Coatings Systems

作　　者：耿刚强[1] 刘攀[1] 李春轩 彭晓春[1] 刘胜林[1] 

机构地区：[1]长安大学材料科学与工程学院,西安710064 [2]陕西通宇公路研究所有限公司,西安710064

出　　处：《涂料工业》2009年第4期59-62,66,共5页Paint & Coatings Industry

基　　金：国家西部交通建设科技项目(200431882225)

摘　　要：涂料在自然曝晒的条件下进行老化,需要很长的时间,不能快速了解其老化失效机理,采用人工紫外-喷淋的加速老化试验对醇酸体系和聚氨酯体系进行加速老化,利用SEM、光泽度仪和FT-IR对老化的涂层进行分析表征。结果表明,两种体系的老化失效机理是不同的,醇酸体系使用寿命低于聚氨酯体系的主要原因是其耐水能力较弱,若能提高其耐水能力,醇酸体系的使用范围将会扩大。Paint ageing will take a long time under the conditions of field exposure, their failure mechanism cann＇t be known quickly. Therefore the artificial UV - condensation accelerated ageing test was used for alkyd and polyurethane systems, and the aged coatings were analyzed by using SEM, glossmeter and FTIR. The results showed that their failure mechanism were different. The shorter life of alkyd system than polyurethane system was because of its weak water rsistance. If the water resistance of alkyd system can be improved, the use area of alkyd system will be expanded.

关 键 词：人工加速老化 醇酸磁漆 聚氨酯面漆 表面分析 

分 类 号：TQ630.72[化学工程—精细化工]