FORMATION OF JUNCTIONS IN THE 3-DIMENSIONAL NETWORK OF 3D METAL-COORDINATED POLYURETHANES

Formation of junctions in the three-dimensional polymer-network of 3d metal-coordinated polyurethanes obtained by adding binuclear coordinat ion compounds of 3d metals (Fe, Cu) to the system was studied. The mol ecular mass characteristics of the products produced by the reaction o f urethane formation up to the gel point were determined, and some kin etic parameters of the process were estimated. A metal complex reacts with a prepolymer based on oligo(ether diol) or oligo(ester diol) and tolylene 2,4-diisocyanate bearing NCO terminal groups by means of chai n lengthening through the reaction of azo formation and coordination b inding of 3d ions to the urethane and eater groups of neighboring chai ns to form branching junctions.