Facile synthesis of cyclic RAFT agents and ring expansion radical polymerization of vinyl monomers having cyclic topology

Abstract

In this paper, we describe the synthesis of cyclic vinyl polymers by ring-expansion radical polymerization using a cyclic RAFT agent, which is prepared by bimolecular ring-closing esterification of succinic acid...

Self-Catalyzed Hydrolysis of Nitrile-Containing RAFT Chain-Transfer Agent and Its Impact upon Polymerization Control of Methacrylic Monomers

“…It is well-known that CTAs can undergo light-initiated degradation, aminolysis, cyclizations, and hydrolysis under certain conditions. − Additionally, a few studies have shown that the 4-cyanopentanoic acid group can undergo self-catalyzed hydrolysis to yield an amino adduct. , In one study, Fuchs et al reported the hydrolysis of trithiocarbonates containing this R group and various Z groups (thiododecanyl, thiobutanyl, thioethanyl, and 2-phenyl­(thioethanyl)) and investigated the impact on polymerization control of methyl methacrylate (MMA). Molecular weight and Đ increased with the addition of the amine adduct to pure CTA, indicating a loss of control.…”