| 초록 |
Issues about volatile organic compounds emerge whenever conventional coating operations are conducted. To cope with these problems, powder coatings are used as alternatives for them. Powder coatings are recognized as environmently friendly systems that have no volatile compounds and also as materials that can compete in price with the conventional coatings. However, recycling of waste powder coatings is still limited because the technical approach of waste powder should be based on polymer properties rather than paint technologies. In this study, a waste powder coating composed of epoxy and polyester resin is selected as a model paint for the recycling of waster powder coatings. Various instrumental techniques are used to investigate the effect of important variables, such as composition, transition temperature, powder size and its size distribution. Among them, chemorheological application has its role to characterize the cure reaction of the waste powder coating. Cure reaction analysis based on chemorheology suggests the optimum processing condition of curing temperature and time for the paint selected in this study. |
