Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Change in the Properties of Linear Low-Density Polyethylene (LLDPE)/Montmorillonite Clay Nanocomposites after a Fuel-Aging Process

Texto completo
Autor(es):
Komatsu, Daniel [1] ; Paranhos, Caio Marcio [1] ; Venancio, Tiago [1] ; Ruvolo-Filho, Adhemar [2]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Fed Sao Carlos, Dept Chem, Sao Paulo - Brazil
[2] Univ Fed Sao Carlos, Dept Mat Engn, Sao Paulo - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Industrial & Engineering Chemistry Research; v. 52, n. 22, SI, p. 7382-7390, JUN 5 2013.
Citações Web of Science: 1
Resumo

Linear low density polyethylene (LLDPE)/montmorillonite clay (MMT) nanocomposites were obtained by dilution of a master batch containing 20.0% clay content in a twin screw extruder to obtain samples with 1.5-10.0% clay content. Samples were aged in fuel (ethanol or gasoline) for 30 days at room temperature (25 degrees C). In the present study, wide-angle X-ray diffraction (WAXD) showed that ethanol interacts with clay more than gasoline does, rearranging the clay structure that was lost during the preparation of the nanocomposites. Solid-state C-13 NMR spectroscopy showed that MMT modified the morphological structure of the LLDPE matrix, making it more heterogeneous. Moreover the fuel-aging process generates structures that are more heterogeneous than nonaged nanocomposites. Finally, fuel sorption analysis was used to verify the structure of the LLDPE matrix after the addition MMT. It was observed that the gasoline diffusion coefficients were higher than the ethanol diffusion coefficients. (AU)

Processo FAPESP: 06/61008-5 - Sistemas poliméricos nanoestruturados: processamento e propriedades
Beneficiário:Rosario Elida Suman Bretas
Linha de fomento: Auxílio à Pesquisa - Temático