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Resistance to weathering of wood-polypropylene and wood-wollastonite-polypropylene composites made with and without carbon black
Department of Mechanical Engineering, Lappeenranta University of Technology .ORCID iD: 0000-0002-7282-9841
Department of Mechanical Engineering, Lappeenranta University of Technology.
2014 (English)In: Pigment & Resin Technology, ISSN 0369-9420, E-ISSN 1758-6941, Vol. 43, no 4, 185-193 p.Article in journal (Refereed) Published
Abstract [en]

Purpose - The purpose of this paper is to study natural and accelerated weathering of wood-polypropylene (WF-PP) and wood-wollastonite-polypropylene composites made with and without carbon black.

Design/methodology/approach - Natural weathering was conducted in Ruokolahti, Finland in the time of year when solar radiation was maximal. The accelerated weathering tests included exposure to a xenon-arc source with and without spray, and a cyclic test consisting of water immersion-freeze-thaw stages.

Findings - Both the type of weathering and the formulation of the composite determined the degree of change in their properties. Weathering, including xenon-arc exposure with spray resulted in much higher changes of colour of non-pigmented composites compared to natural weathering or xenon-arc weathering without spray. Both UV irradiation and moisture had an adverse effect on the Charpy impact strength of non-pigmented composites. Carbon black containing composites performed better than non-pigmented composites.

Research limitations/implications - This study is a part of an ongoing research on the development of wood-polymer composites (WPCs) suitable for outdoor applications in Finnish climatic conditions. Outdoor weathering limited to 1,000 h cannot be used for the prediction of the service life of composites and was used here solely for comparative purposes.

Originality/value - This paper will help to understand the effect of different weathering factors on the behaviour of WF-PP and wood-wollastonite-polypropylene composites made with and without carbon black (as UV stabiliser). The study demonstrated that while accelerated weathering tests provided useful information on the resistance of WF-PP composites to different weathering factors, they cannot be used alone to predict the behaviour of WPCs meant for outdoor application

Place, publisher, year, edition, pages
Emerald Group Publishing Limited, 2014. Vol. 43, no 4, 185-193 p.
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-66648DOI: 10.1108/PRT-03-2013-0019Scopus ID: 2-s2.0-84907143305OAI: oai:DiVA.org:ltu-66648DiVA: diva2:1158428
Available from: 2017-11-20 Created: 2017-11-20 Last updated: 2017-11-24Bibliographically approved

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