Microstructure and properties of poly(ethylene terephthalate)/organoclay nanocomposites prepared by water-assisted extrusion: Effect of organoclay concentration

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DOIResolve DOI: http://doi.org/10.1002/pen.23736
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TypeArticle
Journal titlePolymer Engineering and Science
ISSN0032-3888
Volume54
Issue8
Pages18791892; # of pages: 14
SubjectExtrusion; Mixing; Organoclay; Polyethylene terephthalates; Scanning electron microscopy; Transmission electron microscopy; X ray diffraction; Elongation at break; Gas barrier properties; Mechanical and barriers; Microstructure and properties; Poly(ethylene terephthalate) (PET); Solid state polymerization; Transmission electron; Twin screw extrusion; Nanocomposites
AbstractPoly(ethylene terephthalate) (PET)/Cloisite 30B (C30B) nanocomposites containing different concentrations of the organoclay were prepared using two different twin-screw extrusion processes: conventional melt mixing and water-assisted melt mixing. The reduction of the molecular weight of the PET matrix, caused by hydrolysis during the water-assisted extrusion, was compensated by subsequent solid-state polymerization (SSP). X-ray diffraction, scanning electron microscopy, and transmission electron microscopy analyses showed intercalated/exfoliated morphology in all PET/C30B nanocomposites, with a higher degree of intercalation and delamination for the water-assisted process. Rheological, thermal, mechanical, and gas barrier properties of the PET nanocomposites were also studied. Enhanced mechanical and barrier properties were obtained in PET-C30B nanocomposites compared to the neat PET. The nanocomposites exhibited higher tensile modulus and lower oxygen permeability after SSP. The elongation at break was significantly higher for SSP nanocomposites than for nanocomposites processed by conventional melt mixing.
Publication date
PublisherWiley
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Automotive
Peer reviewedYes
NPARC number21272926
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Record identifierfed594be-4ad3-41cd-959e-306d015ac63b
Record created2014-12-03
Record modified2016-05-09
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