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Ductile tear behavior of multilayered polypropylene homopolymer/ethylene 1‐octene copolymer sheets
Author(s) -
He Guansong,
Zhang Fengshun,
Yu Huaning,
Li Jiang,
Guo Shaoyun
Publication year - 2016
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.43298
Subject(s) - materials science , polypropylene , copolymer , composite material , octene , extrusion , optical microscope , deformation (meteorology) , ethylene , layer (electronics) , scanning electron microscope , polymer , biochemistry , catalysis , chemistry
The tear resistance of the polypropylene homopolymer (HPP)/ethylene 1‐octene copolymer (POE) alternating multilayered sheets, which were prepared through multilayered coextrusion, was evaluated. Polarized optical microscope (POM) photographs revealed that HPP and POE layers aligned alternately vertical to the interfaces and continuously parallel to the extrusion direction. Tear results demonstrated the conventional blends had less tear‐resistant than the multilayered samples. Large plastic deformation of HPP layer occurred in the multilayered structure during the stable crack growth, causing the tear energy to increase with the number of layers increasing. The measurements of PCMW2D IR and WAXD revealed that the large plastic deformation had a direct relationship with the crystal structure and termination of micro‐cracks by interface. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43298.