THE POLYURETHANEISOCYANURATE MORPHOLOGY

By catalytic trimerization polyurethaneisocyanurates (PUIC) with varyi ng content of isocyanate and oligoester fragments were obtained. The n umber of triisocyanurate fragments in the PUIC network was determined with infrared spectroscopy and by using the multiple disrupted complet e internal reflection technique. It was also shown that the PUIC resis tance to high temperatures improves as the content of triisocyanurate fragments increases.