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Authors
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Satapathy, B.K. ; Ganß, M. ; Weidisch, R. ; Pötschke, P. ; Jehnichen, D. ; Keller, T. ; Jandt, K. D.
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Title
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Ductile-to-semiductile transition in PP-MWNT nanocomposites
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Date
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13.04.2007
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Number
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14680
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Abstract
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A ductile-to-semiductile transition in the crack resistance behaviour of PP/MWNT composites is discussed, using an essential work of fracture approach based on a post yield fracture mechanics concept and its possible interrelation to the structural attributes studied by TEM, SEM, and WAXD. A maximum in the non-essential work of fracture is observed at 0.5 wt.-% MWNT content, which demonstrates the enhanced resistance to crack propagation compared to pure PP, followed by a sharp decline with the increase in MWNT content to 1.5 wt.-%, which reveals a ductile-to-semiductile transition. Fracture kinetic studies present a qualitative picture of the nature of such a transition in terms of a) switch over from non-steady (in pure PP) to steady-state crack tip opening displacement rate (in nanocomposites), and b) a ductile-to-semiductile transition; largely as a result of delayed-yielding of the nanocomposites.
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Publisher
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Macromolecular Rapid Communications
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Wikidata
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Citation
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Macromolecular Rapid Communications 28 (2007) 834-841
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DOI
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https://doi.org/10.1002/marc.200600892
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Tags
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