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Experimental evaluation of anisotropy in injection molded polypropylene/wood fiber biocomposites
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- Ansari, Farhan (author)
- KTH,Biokompositer,Department of Fiber and Polymer Technology, KTH Royal Institute of Technology
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- Granda, L. A. (author)
- Laboratory of Paper Engineering and Polymer Materials (LEPAMAP) Group, Department of Chemical Engineering, University of Girona
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- Joffe, Roberts (author)
- Luleå tekniska universitet,Materialvetenskap
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- (creator_code:org_t)
- Elsevier, 2017
- 2017
- English.
- In: Composites. Part A, Applied science and manufacturing. - : Elsevier. - 1359-835X .- 1878-5840. ; 96, s. 147-154
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Keyword
- 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
- Polymeric Composite Materials
Publication and Content Type
- ref (subject category)
- art (subject category)
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