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Morphology and thermomechanical properties of recycled PET–organoclay nanocomposites

✍ Scribed by Maria T. M. Bizarria; André L. F. de M. Giraldi; Cesar M. de Carvalho; Jose I. Velasco; Marcos A. d'Ávila; Lucia H. I. Mei

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
348 KB
Volume
104
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

Recycled PET/organoclay nanocomposites were prepared by melt intercalation process with several amounts (1, 3, and 5 wt %) of clay modified with quaternary ammonium salt (DELLITE 67G) dispersed in a recycled poly(ethylene terephthalate) (rPET) matrix. The resultant mechanical properties (modulus and yield strength) of the nanocomposites were found to be different from those of rPET. Wide angle X‐ray scattering (WAXS) and Transmission Electron Microscopy (TEM) measurements have shown that although complete exfoliation was not achieved, delaminated clay platelets could be observed. Thermal analysis did not show significant changes in the thermal properties from those of recycled PET. Mechanical testing showed that nanocomposite properties were superior to the recycled PET in terms of strength and elasticity modulus. This improvement was attributed to nanoscale effects and strong interaction between the rPET matrix and the clay interface, as revealed by WAXS and TEM. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 1839–1844, 2007

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