Influence of wood extractives on two-component polyurethane adhesive for structural hardwood bonding
| Autor: | Mario Beyer, Johannes Konnerth, C Swaboda, Peter Niemz, Frédéric Pichelin, Ingo Mayer, N. Bieri, G. Weiland, Stefan Bockel, S. Harling |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Materials science 01 natural sciences Acetic acid chemistry.chemical_compound Fagus sylvatica 010608 biotechnology Materials Chemistry Hardwood Composite material Beech Polyurethane 040101 forestry biology technology industry and agriculture 04 agricultural and veterinary sciences Surfaces and Interfaces General Chemistry Adhesion Dynamic mechanical analysis biology.organism_classification Surfaces Coatings and Films chemistry Mechanics of Materials 0401 agriculture forestry and fisheries Adhesive |
| Zdroj: | The Journal of Adhesion. 94:829-845 |
| ISSN: | 1545-5823 0021-8464 |
| DOI: | 10.1080/00218464.2017.1389279 |
| Popis: | When bonding wood for structural applications, the wood–adhesive bond is influenced by a variety of factors. Besides the physical and mechanical properties of wood species, their chemical composition, e.g. wood extractives, can play a role in bonding wooden surfaces. A two-component polyurethane system (2C PUR) was chosen to better adapt to the current adhesion problem. The influence of extractives on crosslinking was determined by Attenuated Total Reflection-Fourier Transform Infrared Spectrometer (ATR-FTIR) and on the rheological behavior in terms of gel point and storage modulus. Therefore, 2C PUR was mixed with 10% of eight common wood extractives separately. Furthermore, the mechanical properties of beech wood (Fagus sylvatica L.) bonded with extractive enriched adhesive were tested by means of tensile shear strength tests and evaluation of wood failure. These results of ATR-FTIR clearly show that the majority of crosslinking was terminated after 12 hr. Acetic acid and linoleic acid expedited... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|