Cationic grafting from carbon black. III. Grafting of polyesters from carbon black by ring‐opening polymerization of lactones initiated by CO+ClO 4−groups on carbon black

摘要

AbstractIt was found that the cationic ring‐opening polymerization of δ‐valerolactone (VL), ε‐caprolactone (CL), and β‐propiolactone (PL) was initiated by carbon black containing CO+ClO 4−groups, which were introduced by the reaction of COCl groups with AgClO4. The polyester was propagated from CO+ClO 4−groups and effectively grafted onto carbon black surface. The polymerizability of these lactones by CO+ClO 4−groups decreased in the following order: VL>CL>PL. The increasing temperature of the polymerization caused an increase in the rate of the chain transfer reaction of the growing chains and brought about the decrease of grafting ratio of polye