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Experimental evaluation of anisotropy in injection molded polypropylene/wood fiber biocomposites
Department of Fiber and Polymer Technology, KTH Royal Institute of Technology.
Laboratory of Paper Engineering and Polymer Materials (LEPAMAP) Group, Department of Chemical Engineering, University of Girona.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Department of Fiber and Polymer Technology, KTH Royal Institute of Technology.
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Number of Authors: 5
2017 (English)In: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 96, 147-154 p.Article in journal (Refereed) Published
Abstract [en]

Although the anisotropy of wood fibers is reasonably well established, the anisotropy of injection molded wood fiber composites is not well understood. This work focuses on chemo-thermomechanical pulp (CTMP) reinforced polypropylene (PP) composites. A kinetic mixer (Gelimat) is used for compounding CTMP/PP composites, followed by injection molding. Effects from processing induced orientation on mechanical properties are investigated. For this purpose, a film gate mold was designed to inject composites in the shape of plates so that specimens in different directions to the flow could be evaluated in tensile tests. Observations from tensile tests were complemented by performing flexural tests (in different directions) on discs cut from the injected plates. SEM was used to qualitatively observe the fiber orientation in the composites. At high fiber content, both modulus and tensile strength could differ by as much as 40% along the flow and transverse to the flow. The fiber orientation was strongly increased at the highest fiber content, as concluded from theoretical analysis.

Place, publisher, year, edition, pages
2017. Vol. 96, 147-154 p.
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-61943DOI: 10.1016/j.compositesa.2017.02.003ISI: 000399850600016Scopus ID: 2-s2.0-85014372994OAI: oai:DiVA.org:ltu-61943DiVA: diva2:1073439
Note

Validerad; 2017; Nivå 2; 2017-03-07 (rokbeg)

Available from: 2017-02-10 Created: 2017-02-10 Last updated: 2017-05-18Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf