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Effect of open assembly time and equilibrium moisture content on the penetration of polyurethane adhesive into thermally modified wood
University of Göttingen, Germany.
Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för skog och träteknik (SOT). (GoFP)ORCID-id: 0000-0002-6909-2025
University of Göttingen, Germany.
2017 (engelsk)Inngår i: The journal of adhesion, ISSN 0021-8464, E-ISSN 1563-518X, Vol. 93, nr 7, s. 575-583Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The effect of wood moisture content and open assembly time on penetration of polyurethane (PU) adhesive into thermally treated Scots pine (195 and 210°C) was investigated according to effective (EP) and maximum penetration (MP) measurements using fluorescence microscopy. For samples treated at 195°C, a higher EP was noted at 8.6% equilibrium moisture content (EMC) after both assembly times (15 and 30 min) while for samples treated at 210°C, increasing wood moisture content resulted in a significant decrease in EP at 12.5% EMC after 15 min assembly time. Extending open assembly time was found to increase the EP of PU adhesive only in the case of samples treated at 195°C and with 8.6% EMC. For samples treated at both treatment temperatures and after shorter open assembly time, the highest MP observed at moderate EMC levels of 8.6 and 8.2% and the lowest at the higher EMC levels of 13.2 and 12.5%.

sted, utgiver, år, opplag, sider
Taylor & Francis, 2017. Vol. 93, nr 7, s. 575-583
Emneord [en]
adhesive bondlines, adhesive penetration, bonding variables, fluorescence microscopy, polyurethanes, thermal modification, wood
HSV kategori
Forskningsprogram
Teknik, Skog och träteknik
Identifikatorer
URN: urn:nbn:se:lnu:diva-48468DOI: 10.1080/00218464.2015.1118621ISI: 000398274500004Scopus ID: 2-s2.0-84978999378OAI: oai:DiVA.org:lnu-48468DiVA, id: diva2:885557
Tilgjengelig fra: 2015-12-18 Laget: 2015-12-18 Sist oppdatert: 2019-09-10bibliografisk kontrollert

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