Long-term outdoor weathering evaluation of wood plastic composites

Liqing Wei; Jed Cappellazzi; Mark Manning; Armando G McDonald; Skyler Foster; Jeffrey J Morrell

doi:10.1007/s00107-021-01762-7

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Long-term outdoor weathering evaluation of wood plastic composites

Journal article

Peer reviewed

Long-term outdoor weathering evaluation of wood plastic composites

Liqing Wei, Jed Cappellazzi, Mark Manning, Armando G McDonald, Skyler Foster and Jeffrey J Morrell

European Journal of Wood and Wood Products, Vol.80, pp.23-34

2022

DOI: https://doi.org/10.1007/s00107-021-01762-7

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Abstract

Tourism

competences

experience design

intangible cultural heritage

Oman

There are relatively few long-term studies of wood plastic composite (WPC) performance, especially under harsh subtropical conditions. This study examined changes in wood/polymer composition, surface chemistry, and thermal properties of WPC decking with and without a co-extruded cap layer after 8–14 years of above ground outdoor exposure at a subtropical site near Hilo, Hawaii. WPC condition was assessed using combinations of destructive and non-destructive (TGA, DSC, and FTIR spectroscopy) methods with WPC wood content determined after chemical digestion. Coextruded WPCs were more resistant to above ground weathering than uncapped materials possibly because the cap layer reduced oxygen availability at the interface between the inner (core) and outer (cap) layer. Moreover, increased vinyl concentrations coupled with lower degrees of crystallinity of the polymer matrix suggested the chain crosslinking and scission reactions occurred simultaneously. Wood components in the cap layer of the coextruded WPCs were less susceptible to weathering due to the encapsula-tion by plastic. Therefore, the cap layer showed relatively better thermal stability than the uncapped WPCs.

Details

Title: Long-term outdoor weathering evaluation of wood plastic composites
Authors: Liqing Wei (Author) - University of Idaho
Jed Cappellazzi (Author) - Oregon State University
Mark Manning (Author) - Nisus Corporation
Armando G McDonald (Corresponding Author) - University of Idaho
Skyler Foster (Author) - Oregon State University
Jeffrey J Morrell (Author) - University of the Sunshine Coast, Queensland, National Centre for Timber Durability and Design Life
Publication details: European Journal of Wood and Wood Products, Vol.80, pp.23-34
Publisher: Springer
DOI: 10.1007/s00107-021-01762-7
ISSN: 1436-736X
Organisation Unit: Forest Research Institute; National Centre for Timber Durability and Design Life; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99583107602621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Forestry; Materials Science, Paper & Wood

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Source: InCites