68 / 2023-08-17 14:11:14

Di-Block Copolymers from the Sequential Living Anionic Copolymerization a Phosphaalkene with Styrene

polymerization,phosphaalkene,anionic polymerization,polymethylenephosphine,living polymerization

Phosphorus Material Chemistry and Applied Science > 1) Phosphorus chemistry in material science

Although living polymerization methods are widely applicable to organic monomers, their application to inorganic monomers is rare. A series of poly(methylenephosphine)s and polystyrene-block- poly(methylenephosphine) with narrow dispersity were synthesized by living anionic polymerization. The phosphaalkene, MesP=CPh₂, and styrene can be sequentially copolymerized using n-Buli initiator in toluene and THF solvent system.¹ Analysis by GPC-MALS-V showed that all samples were monodisperse, displayed narrow dispersities (Đ = 1.03–1.29), and generally had molecular weights within ±(2–26%) of those targeted from the monomer-to-initiator ratios. All homo- and co-polymers displayed a single Tg in their DSC chromatograms with the transition temperature for the copolymers being in between those of the corresponding homopolymers. These transitions appear to be dependent on both the copolymer composition and the corresponding chain lengths. ²





(1) Noonan, K. J. T.; Gates, D. P. Ambient-Temperature Living Anionic Polymerization of Phosphaalkenes: Homopolymers and Block Copolymers with Controlled Chain Lengths. Angewandte Chemie International Edition 2006, 45 (43), 7271-7274. DOI: https://doi.org/10.1002/anie.200602955.

(2) Zhang, T.; Conrad, E. D.; Gates, D. P. <p>Di- and tri-block copolymers from the sequential living anionic copolymerization a phosphaalkene with styrene</p>. Polymer 2022, 249. DOI: 10.1016/j.polymer.2022.124831.