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Polyurethane wood adhesives prepared from modified polysaccharides

Hosseinpourpia, Reza and Eceiza, Arantxa and Adamopoulos, Stergios (2022). Polyurethane wood adhesives prepared from modified polysaccharides. Polymers. 14 :3 , 539
[Research article]

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This study investigated the performance of polyurethane adhesives prepared with various combinations of wheat starch that had been modified by isophorone diisocyanate (MS), two polyol types (1,3-propanediol (PD) and glycerol (Gly)), native wheat starch (NS), and 4,4′-diphenylmethane diisocyanate (pMDI) at a NCO:OH weight ratio of 1:1. Two more adhesives were also synthesized with NS, PD, or Gly and pMDI blends and served as controls. The thermal behavior of the adhesives before and after the curing process, as well as their rheological performance and lap shear strength, were analyzed. Differential scanning calorimetry (DSC) showed a reduction in curing temperature and heat by adding MS. The thermal stability of the cured adhesives was slightly increased by MS addition. The viscosity of the adhesives that contained MS substantially increased at a linear ascendant ramp of shear, while the controls exhibited relatively low viscosity during the whole shear rate spectrum from 0.1 to 100 s−1. The tensile shear strength of wood veneers was also significantly increased by the incorporation of MS under both dry and wet measuring conditions. The maximum dry shear strength was obtained for the adhesive with Gly polyol and a higher content of MS and was comparable to the control adhesive with pMDI.

Authors/Creators:Hosseinpourpia, Reza and Eceiza, Arantxa and Adamopoulos, Stergios
Title:Polyurethane wood adhesives prepared from modified polysaccharides
Series Name/Journal:Polymers
Year of publishing :2022
Article number:539
Number of Pages:10
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
Keywords:polyurethane adhesive, wheat starch, pMDI, isocyanate chemistry, wood adhesive
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Type of IDID
ID Code:27445
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
Deposited By: SLUpub Connector
Deposited On:28 Mar 2022 09:25
Metadata Last Modified:28 Mar 2022 09:31

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