Ref.: MpoDe08-001
Apresentador: José Roberto Moraes d'Almeida
Autores (Instituição): d'Almeida, J.M.(Pontifícia Universidade Católica do Rio de Janeiro); Ribeiro, J.S.(Universidade do Estado do Rio de Janeiro);
Resumo:
ABS is a polymer widely used in various industrial sectors. Numerous ABS applications can include continued exposure to sunlight or direct sunlight, which can lead to changes in physicochemical properties and reduce the service life of ABS parts and components. Depending on the type of application, the ABS must have flame retardants additives, which can change the behavior of the polymer against UV radiation. This work aims to study the effect caused by flame retardant additives on the surface hardness and color change of ABS. These two properties are technologically important as they directly affect the service life, either by a loss of wear resistance (hardness) or by changing the color of the product. The behavior of ABS without additives was compared to that of 3 systems with flame retardant additives. A commercial system with brominated flame retardant (Br) and two systems using bio-based flame retardants based on tannic acid (TA) and ammonium polyphosphate (APP). The results of the hardness tests showed an increase in the variation of the measures of the aged polymers in relation to the ones without aging, although the average values did not present statistically significant variation. The color test showed that all samples presented a perceptible color change to an untrained operator, with the exception of the ABS sample with tannic acid, whose color change is only perceptible to a trained operator.