E.s.r. studies on N-methyl-N-allylmethacrylamide (MAMA) and allyl crotonate (AC) were undertaken in order to obtain information on the mechanism of their cyclopolymerization and reactivities of the double bonds involved in these dienes. Amino, hydroxyl and phenyl radicals were used as initiating species. The radicals detected revealed that the rate of intramolecular cyclization of MAMA is faster than that of AC and the methacryloyl group of MAMA has even lower reactivity than allyl and crotonyl groups. The extremely low reactivity of the former is considered to be mainly due to steric hindrance and partly due to the unconjugative nature of its C=C and C=O double bonds.
Посилання на статтю:
Cyclopolyrnerization: XVIII. Electron spin resonance studies on N-methyI-N-allylmethacrylamide and allyl crotonate / Toshiyuki Kodaira* and Yasuhiro Mae // Polymer. – 1992. – Vol 33. – P. 3500-3506.