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Experimental evaluation of anisotropy in injection molded polypropylene/wood fiber biocomposites
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi, Biokompositer.ORCID-id: 0000-0001-7870-6327
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi.ORCID-id: 0000-0001-5818-2378
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2017 (engelsk)Inngår i: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 96, s. 147-154Artikkel i tidsskrift (Fagfellevurdert) 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. 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.

sted, utgiver, år, opplag, sider
Elsevier, 2017. Vol. 96, s. 147-154
Emneord [en]
A. Wood, C. Anisotropy, CTMP orientation, E. Injection molding, Melt processing, Anisotropy, Fibers, Molding, Polypropylenes, Reinforced plastics, Tensile strength, Tensile testing, Thermomechanical pulp, Wood, Wood products, Bio-composites, E. Injection moldings, Experimental evaluation, Fiber contents, Flexural tests, Induced orientation, Wood-fiber composites, Injection molding
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Identifikatorer
URN: urn:nbn:se:kth:diva-207326DOI: 10.1016/j.compositesa.2017.02.003ISI: 000399850600016Scopus ID: 2-s2.0-85014372994OAI: oai:DiVA.org:kth-207326DiVA, id: diva2:1106435
Merknad

QC 20170607

Tilgjengelig fra: 2017-06-07 Laget: 2017-06-07 Sist oppdatert: 2017-11-10bibliografisk kontrollert

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