Ductile tear behavior of multilayered polypropylene homopolymer/ethylene 1-octene copolymer sheets

被引：19
作者：
He, Guansong [1 ,2 ]
Zhang, Fengshun [1 ,2 ]
Yu, Huaning [1 ]
Li, Jiang [1 ]
Guo, Shaoyun [1 ]
机构：
[1] Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China
[2] China Acad Engn Phys, Inst Chem Mat, Mianyang 621900, Sichuan, Peoples R China
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2016年 / 133卷 / 19期
基金：
中国国家自然科学基金;
关键词：
mechanical properties; polyolefins; structure-property relations; BINARY POLYMER BLENDS; ISOTACTIC POLYPROPYLENE; NUCLEATING-AGENT; SIMULTANEOUS PREDICTION; MICROLAYER COMPOSITES; MECHANICAL-PROPERTIES; CRYSTALLINE-STRUCTURE; FRACTURE-BEHAVIOR; YIELD STRENGTH; POLYAMIDE;
D O I：
10.1002/app.43298
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
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. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43298.
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页数：8
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