N‐Oxyl‐kontrollierte radikalische Lösungspolymerisation von Styrol

Abstract

The radical solution polymerization (solvent: anisole) controlled by 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) makes possible to synthesize block copolymers with higher molecular weights, as well as to polymerize solid monomers. Polystyrene previously terminated by TEMPO was employed as a macroinitiator, which was then polymerized at various styrene/anisole ratios, temperatures, and initiator concentrations (initiator: dicumyl peroxide). In addition, model calculations were employed to study the initiator-based acceleration and to simulate the product composition of the resulting polymer. The controlled radical polymerizations in solution and in bulk can be performed through dosed initiator addition with comparable rates of polymerization.