COMPOSITE MATERIALS BASED ON UREA-FORMALDEHYDE BINDERS MODIFIED WITH OXIDE POWDERS

Abstract

A new approach to obtaining urea-formaldehyde polymers is proposed, which is based on the modification of the initial resins with nitriles of organic acids. It is shown that with an increase in the degree of filling, the ordering increases for all types of investigated fillers. The structure of ordered layers in filled systems based on modified urea-formaldehyde oligomers and the role of such layers in the hardening process are studied. It is established that the introduction of low-melting borate glass, electrocorundum and zirconium oxide powders into the modified binder increases the mechanical properties of composites with increased mechanical characteristics sufficient for the manufacture of based on them abrasive tools.