| 초록 |
The accelerated thermal aging of plastics brings about migration of additives onto specimen surface, which is called the “blooming” or “whitening” phenomenon. This has been a problem emerging in the automotive application. When Polypropylene (PP) is in contact with an external environment, the product quality deteriorates because the additives may migrate to the surface during the process or product usage environment. Many species are prone to this migration and blooming phenomena, especially compounds with a low molecular weight. Most examples of migration and blooming are linked with the material nature, molecular properties and structure, and environmental conditions. Therefore, this study presents the mechanism and characteristics of additives migrating of PP surface depending on the behavior of crystallization under acclerated aging. |
