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Deformation mechanisms of polypropylene/polystyrene multilayered films

Authors :
Frank Pfeifer
V. Seydewitz
G. H. Michler
Rameshwar Adhikari
S. Scholtyssek
Heinz W. Siesler
Source :
Journal of Applied Polymer Science. 126:1593-1599
Publication Year :
2012
Publisher :
Wiley, 2012.

Abstract

Multilayered composites of polypropylene (PP) and polystyrene (PS) fabricated by a layer-multiplying coextrusion technique are described. The aim of this investigation was to find a correlation between the morphology and the mechanical and micromechanical deformation behavior. The multilayered films had primarily continuous layers, exhibiting only few defects in layer construction and turning into an irregularly layered system when the calculated layer thickness was only 5 nm. The morphology and layer thickness of both the PP and PS layers affected the mechanical and the micromechanical behavior, which was brittle for the films having PS layers thicker than 75 nm and ductile when the PS layers were 50 nm and thinner. Transmission electron microscopy showed crazes in the thicker PS layers and homogeneous deformation in the thinner ones. The molecular orientation during deformation of the ductile films was calculated from rheo-optical measurements with Fourier transform infrared spectroscopy. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

Details

ISSN :
00218995
Volume :
126
Database :
OpenAIRE
Journal :
Journal of Applied Polymer Science
Accession number :
edsair.doi.dedup.....9e41417a12b7c2708b5ce048a1a479c5
Full Text :
https://doi.org/10.1002/app.36657