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In situobservation of polypropylene composites reinforced by nonmetals recycled from waste printed circuit boards during tensile testing

In situobservation of polypropylene composites reinforced by nonmetals recycled from waste printed circuit boards during tensile testing

Authors :
Yanhong Zheng
Chujiang Cai
Yushan Xing
Zhigang Shen
Shulin Ma
Source :
Journal of Applied Polymer Science. 114:1856-1863
Publication Year :
2009
Publisher :
Wiley, 2009.

Abstract

A great amount of work has been done over the past few years to reuse the nonmetals recycled from waste printed circuit boards in polypropylene (PP) composites. This is because of the very fast generation rate of nonmetal pollution in the world each year and the very fast growing rate of PP applications in industries. This work focuses on the dynamic effects of nonmetals of different particle sizes on the tensile properties and reinforcing mechanisms of nonmetal/PP composites by in situ scanning electron microscopy tensile testing. The observed results show that the dominant deformation mechanism in pure PP is shear yielding. When fine nonmetals are filled into PP, mass microcracks are initiated. The glass fibers first resist the cracks and undertake the loading when they propagate. The crazes propagate slowly and then break the glass fibers. When coarse nonmetals are filled into PP, interfacial debonding and mass microcracks are initiated. A crack is either terminated when it meets another fiber–particulate bundle or branched into finer mass crazing. Interfacial debonding, crack initiation and propagation, and fiber pullout and breakage dissipate tremendous energy. These factors cause improvements in the strength and rigidity of nonmetal/PP composites. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

Details

ISSN :
10974628 and 00218995
Volume :
114
Database :
OpenAIRE
Journal :
Journal of Applied Polymer Science
Accession number :
edsair.doi...........824fe58413f25baf8c2120a68fb2b06b
Full Text :
https://doi.org/10.1002/app.30695