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Method of measuring energy dissipation during crack propagation in polymers with an instrumented ultramicrotome
Luleå tekniska universitet.
Luleå tekniska universitet.
1996 (English)In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 13, no 3, p. 655-662Article in journal (Refereed) Published
Abstract [en]

In order to characterize very local energy dissipation during crack propagation in polymers, an ultramicrotome was instrumented to measure the energy dissipated during sectioning. The work to section per unit area, W s, was measured for five different amorphous polymers [polymethyl methacrylate (PMMA), polystyerene (PS), polycarbonate (PC) and two epoxy resins] in the glassy state. When the section thickness was varied between 60 and 250 nm, W s varied between 15 and 100 Jm-2, depending on the material and section thickness. The method and the results are compared with other methods used for determining the energy dissipation at a local level as well as at a macroscopic level in polymers. The differences between different polymers were found to be contradictory to macroscopic fracture toughness, G lc, measurements. The material that showed the highest W s had the lowest G lc values reported. Possible mechanisms for energy dissipation during sectioning are also discussed.

Place, publisher, year, edition, pages
1996. Vol. 13, no 3, p. 655-662
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-8113DOI: 10.1007/BF00367882ISI: A1996UA89900014Local ID: 6923c2c0-0ab2-11dc-9854-000ea68e967bOAI: oai:DiVA.org:ltu-8113DiVA, id: diva2:981004
Note
Godkänd; 1996; 20070525 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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