Modification of Phenol Formaldehyde Resins with Wood-Pyrolysis Liquid

Summary

No reviewed summary yet. Read the abstract below or open the original publication.

Abstract

One of the directions for improving the production of adhesive materials is the modification of phenol formaldehyde resins. Utilizing the waste and intermediate products from wood-processing industries, particularly in the form of wood-pyrolysis liquid, will deepen the process of comprehensive resource utilization. A body of research lays the groundwork for further developments and targeted regulation of the physicochemical properties of wood-pyrolysis liquid-modified phenol formaldehyde adhesive. The experimental results clearly show that the addition of wood-pyrolysis liquid in various fractional phases (up to 15–20%) significantly increases the delamination and bending strength of birch plywood samples beyond the standard. This is due to the resinous and fatty acids in the wood-pyrolysis liquid reacting with formaldehyde. The resinous and fatty acids integrate into the polymer molecule of the phenol formaldehyde resin, forming a spatially branched structure, leading to the formation of a polymer with a new set of properties. In the interaction mechanism of wood-pyrolysis-liquid-modified phenol formaldehyde adhesive, there is a sequential increase in the molecular weight of substances and, consequently, the depth of penetration.

Abstract as supplied by the source. Full text may be restricted by the publisher.