WebMar 17, 2024 · In the vast majority of atom transfer radical polymerizations, alkyl bromides or alkyl chlorides are commonly employed as initiators, and minimal attention has been given to alkyl iodides. Herein, we report the room temperature Cu (0)-mediated reversible deactivation radical polymerization of acrylates utilizing alkyl iodide as an initiator. WebEquilibrium constants in Cu-based atom transfer radical polymerization (ATRP) were determined for a wide range of ligands and initiators in acetonitrile at 22 °C. The ATRP equilibrium constants obtained vary over 7 orders of magnitude and strongly depend on the ligand and initiator structures.
ATRP: Complete Tools for the Synthesis of Well-Defined, Functionalized
WebA photoinduced atom transfer radical polymerization (photoATRP) of methacrylates is investigated using air-stable FeBr 3 as catalyst in the absence of conventional ATRP initiators, additional ligands, reducing agents, and/or radical initiators. The ATRP alkyl halide initiator is formed in situ via photoreduction of FeBr 3 by methacrylate monomers. … WebATRP is based on an inner sphere electron transfer process,(4) which involves a reversible homolytic (pseudo)halogen transfer between a dormant species, an added initiator or dormant propagating chain end (R-X or R-Pn-X) and a transition metal complex in the lower oxidation state (Mtm/Ln), resulting in the formation of propagating radicals … gtc itns
Diminishing catalyst concentration in atom transfer radical ... - PNAS
WebNov 23, 2024 · In this study, we found that alkyl bromide redox chemistry typically found in atom transfer radical polymerization (ATRP) can be incorporated in concert with … WebSelf-condensing vinyl polymerization using ATRP has been applied to inimers, i.e. monomers that also contain activated halogen atoms, such as α-bromoesters and benzyl halides.(11-13) For example, when 2-bromopropionyloxyethyl acrylate was polymerized in the presence of a copper catalyst with 4,4'-dinonyl-2,2'-bipyridine ligands, a … WebOct 17, 2006 · The concept of initiators for continuous activator regeneration (ICAR) in atom transfer radical polymerization ... (ATRP initiator RX and polymeric dormant species) remains constant throughout the reaction, which gives rise to a linear increase in molecular weight with monomer conversion, and further indicates that most of the chain end ... gtc iso 19011:2011