Journal
MATERIALS & DESIGN
Volume 69, Issue -, Pages 181-189Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2014.12.060
Keywords
Nanocomposite; Carbon nanotube; Mechanical properties; Micro-mechanics; Chemical vapor deposition
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Funding
- National Defence University of Malaysia [FRGS/2/2013/TK04/UPNM03/1]
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Multiscale fillers were synthesized through growing carbon nanotubes (CNT) on silica microparticles via catalytic chemical vapor deposition process. The characterization of as-synthesized CNT demonstrated appropriate crystallinity and purity of nanotubes with a production yield as high as 400% according to the catalyst-silica weight. The CNT-silica fillers were incorporated within polypropylene (PP) matrix by melt-mixing process to investigate the rheological and mechanical properties of fabricated nanocomposites. In spite of the inclusion of multiscale fillers up to 2 wt.%, the rheological behaviors of the nanocomposites were comparable to the pristine PP with moderate enhancement. An improvement by more than 35% was achieved for elastic modulus and tensile strength of nanocomposites, which was discussed by employing two micromechanical modeling approaches. The strengthening effects of CNT-silica reinforcement on impact strength of PP was revealed by impact tests and was illustrated through fractography of nanocomposites. (C) 2015 Elsevier Ltd. All rights reserved.
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