Tratamento Superficial por Plasma em PVC Plastificado para Aplicações Decorativas por PVD

The surface modification of polymeric materials has led to important advances for new industrial applications, allowing the replacement of engineering polymers by lower cost materials. In this context we study the surface modification of a polymeric material based on PVC-DEHP via N2O2 plasma treatment, applied to decorative metallization by physical vapor deposition (PVD). The ATR-FTIR analyzes did not reveal significant changes in the surface of the compound in addition to the presence of hydroxyls (3200-3500cm-1 ), and changes in the carbonyl region (1720cm-1 ) after exposure to plasma. On the other hand, AFM analyzes revealed that the surface roughness is increased, being constant (46.59 ± 9.51nm) above 240 seconds of plasma treatment. A similar effect was observed in contact angle measurements, which after a 36% reduction in its value remains constant (39° ± 4°) for plasma treatments with times above 240 seconds, being surface more hydrophilic. Adhesion tests on the metallized layer indicate that 240 seconds is the minimum time needed to achieve sufficient adhesion for this system, showing an area of removed material less than 5%.