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Influence of cure conditions on the properties of a one-component moisture-cured polyurethane adhesive in the context of green gluing of wood
SP Technical Research Institute of Sweden.
SP Technical Research Institute of Sweden.
RISE - Research Institutes of Sweden, Materials and Production, IVF.ORCID iD: 0000-0001-9082-9856
SP Technical Research Institute of Sweden.
2012 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 126, no SUPPL. 1, p. E296-E303Article in journal (Refereed) Published
Abstract [en]

A commercial one-component moisture-cured polyurethane-urea wood adhesive was investigated under different curing environments to simulate parameters during green gluing, that is, gluing of freshly sawn and undried timber. This process is an eco-efficient and waste eliminating process in which only the finished wood product properties have been tested; however, not the adhesive itself. Therefore, the effect of moisture and postcuring heat treatment on the adhesive properties such as cure, chemical, and physical characteristics, and adhesion to wood were studied. It was determined by rheometry that the water content was proportional to the time to gel point, with moisture content of 2.6-5.6 wt % water, resulting in a higher initial storage modulus of the adhesive. Additionally, it was found that the strength of the wet glued bonds was significantly higher after the heat treatment, corresponding to the increase in ordered bidentate groups (Fourier transform infrared spectroscopy), higher storage modulus (rheometry), and higher T g (dynamic mechanical thermal analysis). © 2012 Wiley Periodicals, Inc.

Place, publisher, year, edition, pages
2012. Vol. 126, no SUPPL. 1, p. E296-E303
Keywords [en]
green gluing, moisture curing adhesives, polyurethane adhesive, wet gluing, wood adhesive
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-13340DOI: 10.1002/app.36895Scopus ID: 2-s2.0-84864281628OAI: oai:DiVA.org:ri-13340DiVA, id: diva2:973546
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2019-06-27Bibliographically approved

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Lundevall, Åsa

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