Organic bentonites-HIPS nanocomposites. Influence of EB radiation on the mechanical properties
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2016
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BRAZILIAN MRS MEETING, 15th
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In this paper the influence of additions of two clay types to form nanocomposite
materials with high impact polystyrene as matrix, is discussed. Among the clays
used as reinforcing material there are calcic Cuban and sodic Brazilian
bentonites. The additions were made at two levels: 5 and 7% relative to the
weight of the material. All clays used were subjected to organic modification.
Composite material pellets were prepared in a hot extrusion process adding the
clays with the aid of a vibrating dispenser. Mechanical tests samples, for tensile
and impact tests according to ASTM standards, were elaborated in an injection
molding machine. Another objective of this work was to study the effect of
electron beam radiation in the mechanical properties of the nanocomposites. Half
of the samples were irradiated at 600KGy and tested after a 7 days wait to ensure
their stability. The rest of the specimens were tested from their direct injection
state. It was shown that an addition of up to 5% of clay as reinforcement in a
matrix of HIPS achieved increases in tensile strength over 30% compared with
the unreinforced polymer. Additions of higher amounts of clay (7%) represented a
decrease on mechanical strength, but remaining even above that of the pure
polymer. Electron beam Irradiated samples showed a considerable increase in the
mechanical strength with respect to the pure material. Increases between 48 and
56% in the tensile strength were achieved. In all cases, as it is expected
elongation and impact strength decreased with the aforementioned increase in
tensile strength.
Como referenciar
GARCIA, FRANCISCO J.M.; PORRUA, AMANDA R.; COLLS, GISELLE F.; MOURA, ESPERIDIANA A.B.; VALENZUELA, MARIA das G. da S.; MOLINER, TANIA R.; RIVERA, JOSE L.V.; DIAZ, FRANCISCO R.V. Organic bentonites-HIPS nanocomposites. Influence of EB radiation on the mechanical properties. In: BRAZILIAN MRS MEETING, 15th, September 25-29, 2016, Campinas, SP. Abstract... São Carlos, SP: Aptor Software, 2016. p. 447-447. Disponível em: http://repositorio.ipen.br/handle/123456789/28061. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.