Yh. Qi et al., Synthesis and free-radical ring opening polymerization of macrocyclic arylthioether ether ketone (sulfone) oligomers, CHEM J CH U, 21(3), 2000, pp. 480-483
Two kinds of novel macrocyclic aryl thioether ether oligomers were synthesi
zed by nucleophilic condensation reaction in high yields under pseudo-high-
dilution condition. A combination of H-1 NMR, GPC and MALDI-TOF MS analyses
unambiguously confirmed the cyclic nature and their distributions, Macrocy
clic thioether ether ketone oligomers can undergo facile melt ring opening
polymerization(ROP) initiated by thiyl radical to give a high molecular wei
ght polymer.