A study of crosslinking in epoxide-amine systems by pulsed NMR spectroscopy☆

The process of crosslinking in a polymer prepared from diphenylolpropane diglycidyl ether and 1,3-bis-(aminomethyl)-adamantane was studied by the methods of NMR transversal relaxation, differential microcalorimetry and IR spectroscopy. In native samples a group of slowly relaxing protons was observed, with a glass temperature higher by 20 K than Tg of the polymer cured to the limit. The temperature of mobility melting in structural elements in native and post-cured polymer samples falls with an increase in the temperature of isothermic curing.