ABSTRACT
The polymer industry has undergone many advances in the last decade, among them, innovations in the processing and in the use of additives, which enable the use of polymers in several areas, especially, when exposed to external environment. However, for some specific applications, the polymer must be submitted to surface treatments in order to increase its superficial roughness. Then, much remains to be studied regarding the behavior of these additives when exposed to transformation processes in which the polymers are normally subjected, as for example, the corona treatment. Thus, this study aims to evaluate the structural modifications in stabilizing additives present in polymeric films, when subjected to corona treatment. Three different UV absorbers additives were evaluated: benzophenone, benzotriazole and triazine. The films were processed by spin coating and subjected to ultraviolet radiation, in order to simulate the external exposition of the polymer, and corona treatment. Analyzing the results obtained, it was realized that the only additive that resisted to thetreatment conditions was benzotriazole, maintaining the absorption of ultraviolet radiation even after corona treatment and protecting the polymer from UV degradation. The other additives suffered degradation processes, caused by corona treatment, and the absorption of ultraviolet radiation presented earlier, ceases to exist.
Keywords
Additives; Corona Treatment; Polymeric Films; Stabilizers; UV radiation
