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The polymeric materials are sensitive to ultraviolet radiation, causing changes in their properties. From this perspective, the present study exposed low density polyethylene (LDPE) to ultraviolet radiation for 150 and 300 hours. Physical-chemical evaluation and mechanical characterization were performed to verify the macromolecular changes produced by such radiation and confirmed by visual examination. In view of the results, the occurrence of degradation, through the presence of chain rupture, besides the production of crosslinking, and a subtle decrease of the crystallinity were confirmed. The tensile test confirmed the embrittlement produced by the radiation. The ballistic performance of the ethylane acrylate-based adhesive plates produced delamination, unlike that observed in the silicone-fixed plates.

INFLUÊNCIA DA RADIAÇÃO ULTRAVIOLETA NO COMPORTAMENTO MECÂNICO DE COMPÓSITOS LAMINADOS DE POLIETILENO DE BAIXA DENSIDADE (PEBD) UNIDOS POR RESINA A BASE ETILCIANOACRILATO E POR SILICONE