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Assessing local yield stress and fracture toughness of carbon nanotube poly(methyl methacrylate) composite by nanosectioning
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
Ctr Invest Cient Yucatan AC, Unidad Mat, Calle 43 130 X 32 Y 34,Col Chuburna Hidalgo, Merida 97205, Yucatan, Mexico..
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics.
2017 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 153, p. 95-102Article in journal (Refereed) Published
Abstract [en]

A nanosectioning (cutting) method was used to test the local shear yield stress and fracture toughness (specific work of surface formation) of multiwall carbon nanotube (MWCNT) poly(methyl methacrylate) (PMMA) composites, and the effects of MWCNT content on the yield stress and toughness were investigated. The composites were prepared by a solution casting method, with MWCNT content varying from 0.05 to 1.0 wt%. Above 0.1 wt% MWCNT content, the yield stress reduced by the addition of MWCNTs. The fracture toughness of the composite was effectively enhanced by the addition of MWCNTs, ranging from 17 J/m2 for the neat PMMA to 25 J/m2 for the 1.0 wt% composite. The shear yield stresses obtained by nanosectioning were correlated to nanoindentation measurement, and possible contributions from the MWCNTs to the fracture toughness of the composite were analysed.

Place, publisher, year, edition, pages
2017. Vol. 153, p. 95-102
Keyword [en]
Fracture toughness, Shear yield stress, Nanosectioning, Carbon nanotubes, Polymer composites
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:uu:diva-340329DOI: 10.1016/j.compscitech.2017.09.034ISI: 000418986300010OAI: oai:DiVA.org:uu-340329DiVA, id: diva2:1178759
Available from: 2018-01-30 Created: 2018-01-30 Last updated: 2018-02-12Bibliographically approved

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Wiklund, UrbanGamstedt, E. Kristofer

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