USAGE OF BI- AND POLYFUNCTIONAL COMPOUNDS AS AN ALTERNATIVE OF SYNTHETIC RESINS IN FI-BERBOARD TECHNOLOGY

Due to the high chemical activity of its filler, fiberboard is a unique material, it's formation can be ensured by reactions wood components. However, under hot pressing modes, typical for dry-process boards, do not have time go through required extent, which requires use special modifiers that enhance fiber. Bi- and polyfunctional compounds - sucrose, carbamide, citric acid were investigated as modifiers. The lowest efficiency was shown able ensure compliance physical mechanical parameters fiberboards with requirements standards; urea makes it possible produce are inferior in their properties materials from urea-formaldehyde resin. Using methods instrumental analysis (IR spectroscopy, solid-state 13C NMR spectroscopy), found during pressing, react components cell wall. Urea decomposes ammonia isocyanic acid, which, turn, provides interfiber interaction. During reacts hydroxyl groups wall esterification mechanism. example plates meet TSN-30 standart made only 0.4 min / mm thickness, exceeds technology more than two times. To competitiveness selected respect existing synthetic resins, necessary find ways reduce time.