Efeito da composição e tamanho de partículas de resíduos de pinus nas propriedades de compósito de polipropileno / Composition and particle size effects on polypropylene composite properties

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

26/02/2010

RESUMO

Wood pallets manufacture process at a company at Campinas region generate 100 tons per day of woodflour (Pinus sp), which are currently used for burning in industries of the region contributing to the global warming. The aim of this research was evaluated the effect of formulation and size woodflour (Pinus sp) in properties of polypropylene composite. It was investigated the effect of the wood particle size and polymer: particle ratio in the properties of polypropylene composite. In the first phase, the composite was processed in a twin-screw extruder, containing 20- 40% of wood particles and three particle sizes: 1.2, 0.42 and 0.15 mm. Specimens were molded according to ASTM Standards and submitted to the mechanical tests (tensile, flexural and impact). The results were compared by statistics analysis, with Statgraphics 4.1 software. In general, best results were obtained with composite with size Pinus sp of 0.15mm in the tensile and impact test. To flexural, best results were obtained with composite with size of 1.2mm. In second phase, the composite with particle 0.15mm was processed again with 20- 40wt% and coupling agent, maleic anhydride modified polypropylene (MAPP) and organosilane, added in ratio of 2% of total weight of PP by assessing the performance between them when submitted a tensile, flexural and impact test (notch and unnotcht). The results were compared by statistics analysis, with a software, to validate best combination of materials. The effect of the surface treatments applied to the Pinus sp particle on the dimensional stability of composites when immersed in water. In parallel, also sought to evaluate the change in particle surface, by scanning electron microscopy (SEM), where he observed the formation of insufficient crosslink on the surface of the particles of Pinus sp when using coupling agents

ASSUNTO(S)

compósito polipropileno resíduos madeira reciclagem composite polypropylene residue wood recycling

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