Mechanism of trialkylboron initiated polymerization

Indefinitely active aqueous cationic polymerizations, part I: Low cost, recyclable initiator systems

“…Such behavior is contradictory to a reaction that proceeds by a C + chain carrier. It is known that other organoboron compounds (e.g., Et 3 B) can induce radical polymerization of ST and other monomers (e.g.,IP) in aqueous media . Thus, additional studies in this area are needed.…”

“…It is known that other organoboron compounds (e.g., Et 3 B) can induce radical polymerization of ST and other monomers (e.g.,IP) in aqueous media. [126][127][128][129][130][131][132][133][134][135][136][137] Thus, additional studies in this area are needed.…”

Exploration of Dimethylzinc‐Mediated Radical Reactions

“…). Interestingly, this step does not proceed without trialkylborane [33b,33f] . These O‐centered radicals further react with trialkylborane to generate alkyl radicals (Eqs.…”

“…Nowadays, the autoxidation of organoborons, especially triethylborane, is a widely utilized method to initiate radical reactions . Much effort has been made to clarify the mechanism of the autoxidation . Although it is not yet fully understood, the plausible mechanism at present is as follows.…”

On the existence of a free‐radical organoboron complex in the polymerization of methyl methacrylate

“…Poly(methy1 methacrylate) (PMMA) can be polymerized by triethylboron in conjunction with oxygen in what is known to be a free-radical p r o c e s s (2). If triethylboron (0.5% by weight) is introduced into a nitrogen-purged flask containing methyl methacrylate (99.5% by weight) a t room temperature and is subsequently permitted limited access to air, a high conversion, high molecular weight polymer results.…”