Abstract
In this work, the TiO/sub 2/ pigment influence in HDPE dielectric strength was analyzed. Chemical and structural characterizations were made to identify changes during the processing and the influence in the electrical properties. Formulations containing 0, 0.5, 1, 2.5, 4 and 6 of titanium dioxide were processed by extrusion and injection molding with stabilization-antioxidants, ultraviolet stabilizers and plasticizers. The electrical strength tests were analyzed by the statistical distribution of Weibull, and the maximum likelihood method. The high concentrations present lower values to electrical strength. The /spl beta/ parameter could be using to insulator particles dispersion. The TiO/sub 2/ concentration variation shows that these incorporations implicate strength value increase has a maximum (5,35 MV/cm). High pigment concentration induces a fall in property values. Observing the /spl beta/parameter, minimum experimental electric field (Ebmin) and electric strength value, found that the best electric perform formulation was the formulation with 2.5% TiO/sub 2/ weight.
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