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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Komatsu, Daniel [1] ; Paranhos, Caio Marcio [1] ; Venancio, Tiago [1] ; Ruvolo-Filho, Adhemar [2]
Total Authors: 4
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem, Sao Paulo - Brazil
[2] Univ Fed Sao Carlos, Dept Mat Engn, Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Industrial & Engineering Chemistry Research; v. 52, n. 22, SI, p. 7382-7390, JUN 5 2013.
Web of Science Citations: 1
Abstract

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)

FAPESP's process: 06/61008-5 - Nanostructure polymeric systems: processing and properties
Grantee:Rosario Elida Suman Bretas
Support type: Research Projects - Thematic Grants