Journal
POLYMERS
Volume 9, Issue 5, Pages -Publisher
MDPI AG
DOI: 10.3390/polym9050169
Keywords
soy-based adhesive; glutaraldehyde; phenol-formaldehyde; preparation procedure; crosslinking modification
Categories
Funding
- National Natural Science Foundation of China [31660176]
- Introduction of Guizhou University Scientific Research Grants Project [(2016)20]
- Technology Pillar Program during the Twelfth Five-Year Plan Period [2015BAD14B03]
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To prepare a low-formaldehyde soy-based adhesive with good water resistance, phenol-formaldehyde modified with glutaraldehyde (PFG) with lower free phenol and free formaldehyde contents was used to cross-link the soy-based adhesive. The results showed that the mechanical properties and water resistance of plywood prepared with soy-based adhesive with PFG was better than that of plywood with the same amount of phenol-formaldehyde (PF). The reaction between phenol and glutaraldehyde was proved by C-13-NMR. Under the optimized preparation conditions for plywood, that is to say, press temperature 160 degrees C, press time 4 min and resin loading 320 g.m(-2), type I plywood could be prepared with 9% PFG as a cross-linker of soy-based adhesive. The Differential Scanning Calorimetry (DSC) result confirmed the cross-linking reaction between soy-based adhesive and PFG or PF. The activation energy of soy-based adhesive with cross-linker PFG was higher than that with PF resin.
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