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A Novel Strategy for Poly(β-alanine-b-lactone)s: Sequentially HTP and AROP
Efkan Çatıker,Ayçanur Hamzaçebi 한국고분자학회 2022 Macromolecular Research Vol.30 No.5
A series of poly(β-alanine-b-lactone)s were prepared by combination of hydrogen-transfer polymerization (HTP) of acrylamide and anionic ring-opening polymerization (AROP) of β-propiolactone, α-methyl propiolactone, β-butyrolactone, and δ-valerolactone. Poly-β-alanine (PBA) having a living anionic end-group for a further extension was obtained via HTP of acrylamide. Then, the anionic endgroup on PBA chains was used as initiation sites for AROP of the lactones. By varying acrylamide feeds, a series of copolymers was obtained with a hard segment (β-alanine) content between 6.86 and 36.82 mol%. Elemental analyses and spectral data (MALDI-MS, 1H-NMR, and FT-IR) for all new products were consistent with the proposed structures.