Ductile tear behavior of multilayered polypropylene homopolymer/ethylene 1‐octene copolymer sheets. Issue 19 (23rd January 2016)

• Record Type: Journal Article
• Authors: He, Guansong; Zhang, Fengshun; Yu, Huaning; Li, Jiang; Guo, Shaoyun
• Is Part Of: Journal of applied polymer science. Volume 133:Issue 19(2016)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2016-01-23
• Subjects: mechanical properties -- polyolefins -- structure–property relations; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.43298
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: 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. Abstract :