Morphological and rheological properties of PET/clay nanocomposites

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Journal titleRheologica Acta
Pages5974; # of pages: 16
AbstractThis work investigates the effects of clay chemistry and concentration on the morphology and rheology of polyethylene terephthalate (PET)/clay nanocomposites. The complex viscosity of the PET nanocomposites exhibited a more solid-like behavior, in contrast to the matrix that had a frequency-independent viscosity. In addition, at high frequencies where the behavior of the matrix should be dominant, a lower complex viscosity of the nanocomposites was observed due to PET degradation in the presence of the organoclays. The high-frequency data were used to estimate the matrix degradation using the Maron-Pierce equation. The apparent molecular weight of the PET matrix was found to decrease from 65 kg/mol for the neat PET to 30 kg/mol for a PET nanocomposite containing 8 wt% Cloisite® 30B. The apparent yield stress in the nanocomposites was determined using the Herschel-Bulkley model. Yield stress increased with the level of exfoliation and clay concentration, from ~0 to 166 Pa when the clay concentration increased from 2 to 8 wt%. © 2012 Springer-Verlag Berlin Heidelberg.
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AffiliationNational Research Council Canada (NRC-CNRC); Automotive (AUTO-AUTO)
Peer reviewedYes
NPARC number21269980
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Record identifier976c50b8-1981-4a30-a3db-d1ca91e8ef2b
Record created2013-12-13
Record modified2016-05-09
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