bachelorThesis
Avaliação da adesividade de poliuretana derivada de óleo de mamona em superfície metálica por indentação instrumentada
Fecha
2012-10-11Registro en:
VASCO, Marina Cardozo; TAMBANI, Vanessa Xavier de Faria. Avaliação da adesividade de poliuretana derivada de óleo de mamona em superfície metálica por indentação instrumentada. 2012. 79 f. Trabalho de Conclusão de Curso (Graduação) - Universidade Tecnológica Federal do Paraná, Curitiba, 2012.
Autor
Vasco, Marina Cardozo
Tambani, Vanessa Xavier de Faria
Resumen
The corrosion is present in many different ways in our daily lives, causing severe economic losses, with the usual use of polymer films deposited on metal surfaces for their protection. This project proposes to study the adhesion of polyurethane film (PU) derived from castor oil, with variation in the ratio of NCO / OH on metal surfaces of ABNT 1020 steel with different roughness. For this, were used roughness tests and instrumented indentation, and observations of scratch tests by optical microscopy and SEM. The objective was to achieve a combination composition and roughness, so that there is no detachment of the film. There was no adhesion failure in any of the samples, despite this, it was not possible to determine a single optimal combination between the roughness and different compositions of polymer. Regardless of the surface finish, the films of proportion of polyol / prepolymer 1.0:1.0 had the same behavior in the nanoscratch test, as evidenced by the same penetration depth observed in the profile after the scratch. These films were more suitable for metal plating, as that was the only ratio polyol / prepolymer in which the samples showed no delamination.