Well-Defined PIII-Terminated Polymers from Phosphorylated Carbodithioate RAFT Agents
نویسندگان
چکیده
Five S-alkyl di-tert-butylphosphorylated carbodithioates, Z–C(S)SR, were studied as chain transfer agents (CTAs) in the RAFT polymerization of vinyl monomers. These phosphorus-containing CTAs involve new PIII and PV moieties Z group (phosphine-borane or free phosphine). Two them, with an S-bonded 1-methoxycarbonylethyl leaving group, have not previously been described. The a provide good control over styrene (St) n-butyl acrylate (nBA). Molar masses are close to theoretical values, dispersities consistently low during polymerization. monitoring by 31P NMR spectroscopy supports controlled character integrity polymer ends. Conversely, they inhibit less-activated monomer acetate (VAc). reactivity mainly depends on reaction medium, their performance for St, nBA, VAc was surprising unexpected. Theoretical calculations carried out rationalize behavior. Finally, innovative strategy developed obtain well-controlled polymers phosphine ω-chain
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ژورنال
عنوان ژورنال: Macromolecules
سال: 2021
ISSN: ['0024-9297', '1520-5835']
DOI: https://doi.org/10.1021/acs.macromol.0c02805