Study of the effect of ionizing radiation on composites of wood flour polypropylene matrix using barium titanate as coupling agent
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2007
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 8th/ MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 15th
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The aim of this work was to study the effects of ionizing radiation on the properties of wood flour composites in
polypropylene matrix, using barium titanate as a coupling agent and the reactive monomer tripropylene glycol
diacrylate (TPDGA). The investigated compositions consisted of polypropylene/wood flour,
polypropylene/wood flour with barium titanate and polypropylene/wood flour with barium titanate and
TPDGA, using different wood flour concentrations of 10%, 15% and 20%. Subsequently, the samples were
moulded by injection irradiated and submitted to thermal and mechanical tests. The mechanical properties
(hardness, impact strength and melt flow index (MFI)), as well as the thermal properties (thermal distortion
temperature and Vicat softening temperature) of the composites with and without barium titanate and TPDGA,
non irradiated and irradiated were determined. The samples were irradiated in irradiation doses of 10 kGy and
20 kGy in an electron accelerator. Regarding the mechanical properties of non-irradiated samples, the
incorporation of wood four to polypropylene, resulted in a decrease of impact strength and melt flow index as
well as in an increase in hardness, showing that the wood flour acts like a reinforcement agent. As to the
irradiated samples, it was observed a decrease in the impact strength, hardness and thermal distortion
temperature and an increase Vicat softening temperature.
Como referenciar
ULLOA, MARITZA E.P.; MIRANDA, LEILA F. de; ANDRADE e SILVA, LEONARDO G. de. Study of the effect of ionizing radiation on composites of wood flour polypropylene matrix using barium titanate as coupling agent. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 8th/ MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 15th, Sept. 30 - Oct. 5, 2007, Santos, SP. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/15741. Acesso em: 20 Feb 2025.
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