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Moisture uptake and hygroexpansion of wood fiber composite materials with polylactide and polypropylene matrix materials
RISE, STFI-Packforsk.
RISE, STFI-Packforsk.
RISE, STFI-Packforsk.
RISE, STFI-Packforsk.ORCID iD: 0000-0002-0768-8958
2009 (English)In: Polymer Composites, ISSN 0272-8397, E-ISSN 1548-0569, Vol. 30, no 12, 1809-1816 p.Article in journal (Refereed) Published
Abstract [en]

Effects of butantetracarboxylic acid (BTCA) modification, choice of matrix, and fiber volume fraction on hygroexpansion of wood fiber composites have been investigated. Untreated reference wood fibers and BTCA-modified fibers were used as reinforcement in composites with matrices composed of polylactic acid (PLA), polypropylene (PP), or a mixture thereof. The crosslinking BTCA modification reduced the out-of- plane hygroexpansion of PLA and PLA/PP composites, under water-immersed and humid conditions, whereas the swelling increased when PP was used as matrix material. This is explained by difficulties for the BTCA- modified fibers to adhere to the PP matrix. Fiber volume fraction was the most important parameter as regards out-of-plane hygroexpansion, with a high-fiber fraction leading to large hygroexpansion. Fiber-matrix wettability during processing and consolidation also showed to have a large impact on the dimensional stability and moisture uptake.

Place, publisher, year, edition, pages
2009. Vol. 30, no 12, 1809-1816 p.
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:ri:diva-29631DOI: 10.1002/pc.20753Scopus ID: 2-s2.0-73249147817OAI: oai:DiVA.org:ri-29631DiVA: diva2:1099043
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cited By 24

Available from: 2017-05-29 Created: 2017-05-29 Last updated: 2017-10-26Bibliographically approved

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