Utilização de compostos elastoméricos à base de SBR carregados com barita em aventais isolantes de raios X

• Autor(a) principal: Amaral, Graziella Ferecini Bueno
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações do Mackenzie
• Texto Completo: http://dspace.mackenzie.br/handle/10899/24212
• topic: barita; barreira de raios X; compósitos elastoméricos; SBR (Borracha de Estireno-Butadieno); barite; elastomeric composites; SBR (Styrenebutadiene Rubber); X-ray shield; CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA

In this study it was studied the physical-mechanical properties of elastomers based on styrenebutadiene rubber (SBR) with the addition of barite, for application of these compounds in protecting in the shielding against radiation X, for the substitution of aprons form based on elastomer fillered with lead in ergonomic and economically advantageous conditions. Elastomeric compounds were studied with different barite concentrations [50, 75, 100, 125 and 150 phr (parts for hundred of rubber)]. The studied properties were: tensile strength, tensile modulus, tear strength, permanent deformation in compression, hardness, absorption of fluid, resilience, measure of rheology, morphological analysis and characterization of attenuating materials to radiation X. Results showed that all compositions exhibit good dispersion of the filler in the matrix. It was observed that with the increase barite concentration there is an increase in hardness beyond not causing significant alteration in the tensile strenght, in the elasticity, as well as in the resistance to the tearing of the material.