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Polymer Bulletin
Published in: Polymer Bulletin 3/2009

01-03-2009 | Original Paper

Effect of processing conditions on the structural morphology of PP–EP/EVA/organoclay ternary nanocomposites

Authors: E. Ramírez-Vargas, M. Valera-Zaragoza, S. Sánchez-Valdes, J. S. Hernández-Valdez, F. F. Ibarra-Castillo

Published in: Polymer Bulletin | Issue 3/2009

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Abstract

The effect of processing conditions on the morphology of heterophasic PP–EP/EVA/organoclay ternary nanocomposites was examined. The nanocomposites were prepared in a co-rotating twin screw extruder with different screw configurations and incorporation methods. Three different sizes of EVA granules were used. The results obtained by X-ray scattering (WAXD) and electronic microscopy (TEM) showed an increase in d spacing value of the clay associated with the polar interactions between the vinyl acetate of EVA and the surface of the nanoclays. In addition, some chains of the non-polar copolymer PP–EP may have become intercalated into the clay galleries as a result of polymer diffusion induced by shear stress during melt mixing. An increase in surface area of EVA granules resulted in a more homogenous clay dispersion and intercalation. The morphologic changes resulted in an increase in heat distortion temperature (HDT) and flexural modulus of the ternary nanocomposites.
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Metadata
Title
Effect of processing conditions on the structural morphology of PP–EP/EVA/organoclay ternary nanocomposites
Authors
E. Ramírez-Vargas
M. Valera-Zaragoza
S. Sánchez-Valdes
J. S. Hernández-Valdez
F. F. Ibarra-Castillo
Publication date
01-03-2009
Publisher
Springer-Verlag
Published in
Polymer Bulletin / Issue 3/2009
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-008-0015-x

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