Abstract
It is difficult to quantitatively analyze the chemical structure of network polymers that have strong cross-linked structures. Recently, solid-state NMR method attracts attention as the analysis techniques of solid compound with the advances of analytical instruments. We studied the cure degree and the cured chemical structures of random novolac and resol resins by CP/MAS NMR. The measuring method used typical CP/MAS of Solid-State NMR. As a result, it was suggested that the cure degree becomes higher with an increase in the amount of 1,3,5,7-tetraazatricyclo (3.3.1.1 (3,7)) decane that is hardener for novolac resins, and with increasing curing temperature for resol resins. In addition, the existence of an intermediate structure was confirmed for cured random novolac and resol resins.
