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Preparation of Poly...
Preparation of Polyurethane Adhesives from Crude and Purified Liquefied Wood Sawdust
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- Jiang, Wen, 1990- (author)
- Linnéuniversitetet,Institutionen för skog och träteknik (SOT)
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- Hosseinpourpia, Reza, 1983- (author)
- Linnéuniversitetet,Institutionen för skog och träteknik (SOT),Avancerade material
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- Biziks, Vladimirs (author)
- Georg-August University Göettingen, Germany
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- Ahmed, Sheikh Ali, Senior Lecturer, 1977- (author)
- Linnéuniversitetet,Institutionen för skog och träteknik (SOT),Avancerade material
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- Militz, Holger (author)
- Georg-August University Göettingen, Germany
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- Adamopoulos, Stergios (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Skogens biomaterial och teknologi,Department of Forest Biomaterials and Technology,Swedish University of Agricultural Sciences, Sweden
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(creator_code:org_t)
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- 2021-09-25
- 2021
- English.
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In: Polymers. - Basel, Switzerland : MDPI. - 2073-4360. ; 13
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Abstract
Subject headings
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- Polyurethane (PU) adhesives were prepared with bio-polyols obtained via acid-catalyzedpolyhydric alcohol liquefaction of wood sawdust and polymeric diphenylmethane diisocyanate(pMDI). Two polyols, i.e., crude and purified liquefied wood (CLW and PLW), were obtained fromthe liquefaction process with a high yield of 99.7%. PU adhesives, namely CLWPU and PLWPU,were then prepared by reaction of CLW or PLW with pMDI at various isocyanate to hydroxyl group(NCO:OH) molar ratios of 0.5:1, 1:1, 1.5:1, and 2:1. The chemical structure and thermal behavior of thebio-polyols and the cured PU adhesives were analyzed by Fourier transform infrared spectroscopy(FTIR) and thermogravimetric analysis (TGA). Performance of the adhesives was evaluated by singlelap joint shear tests according to EN 302-1:2003, and by adhesive penetration. The highest shearstrength was found at the NCO:OH molar ratio of 1.5:1 as 4.82 ± 1.01 N/mm2 and 4.80 ± 0.49 N/mm2 for CLWPU and PLWPU, respectively. The chemical structure and thermal properties of the cured CLWPU and PLWPU adhesives were considerably influenced by the NCO:OH molar ratio.
Subject headings
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Polymerteknologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Polymer Technologies (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Trävetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Wood Science (hsv//eng)
Keyword
- adhesive penetration; bio-polyol; bond strength; ethylene glycol; FTIR; liquefaction; pMDI; TGA
- Biotechnology
- Bioteknik
Publication and Content Type
- ref (subject category)
- art (subject category)
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