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- W2019156983 abstract "Bis(5(4H)oxazolinones) derived from naturally occurring α-amino acids were reacted with amine-terminated polyethers and polyamides in the bulk at 175-200°C. Model reactions were also carried out using primary alkylamines. The reactions were studied by means of SEC, and 1 H and 13 C NMR, and the resulting polymers were characterized by DSC and TGA. The chain-coupling reaction is extremely fast and yields high molar mass copolymers containing peptide linkages in less than 5 min. The NMR spectra of model compounds and polymers were fully assigned, showing that the oxazolinone/amine polyaddition reaction proceeds in the expected way, without any noticeable side reaction. The polymers exhibit lower crystallinity, higher T g and a melting temperature close to or lower than that of the starting oligomers." @default.
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- W2019156983 date "1998-05-01" @default.
- W2019156983 modified "2023-09-26" @default.
- W2019156983 title "Chain-coupling reaction of amine-terminated oligomers by bis(4-monosubstituted-5(4H)oxazolinones)" @default.
- W2019156983 doi "https://doi.org/10.1002/(sici)1521-3935(19980501)199:5<815::aid-macp815>3.0.co;2-#" @default.
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