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• W2334341510 abstract "A fast and highly efficient approach to aromatic and semiaromatic hyperbranched poly(ester−amide)s via the polycondensation of AA‘ and CBx monomers has been described. 2,2-Diphenic anhydrides (AA‘ monomers) with aromatic or aliphatic multihydroxyl primary amine (CBx monomers) were thermally polycondensed to prepare aromatic and semiaromatic hyperbranched poly(ester−amide)s with multihydroxyl end groups without any catalyst. At the initial stage of the reaction, primary amino groups react rapidly with 2,2-diphenic anhydride, forming an intermediate, multihydroxyl amide acid, which conducts further self-polycondensation as a new ABx monomer to yield hyperbranched poly(ester−amide)s. Analyses of FTIR, 1H NMR, and 13C NMR spectra revealed the structures of the resultant polymers. The DBs of the polymers were determined to be 0.53−0.63 by 1H NMR or 13C NMR inverse-gated decoupling and DEPT spectra. Each kind of hyperbranched poly(ester−amide)s contains two configurational isomers observed by 13C NMR spectra. These polymers exhibit excellent solubility in a variety of solvents such as N,N-dimethylacetamide (DMAc), dimethyl sulfoxide (DMSO), tetrahydrofuran (THF), and chloroform and possess moderate molecular weights with broad distributions determined by size exclusion chromatography (SEC). The thermogravimetric analytic measurement revealed the decomposition temperature of the polymers at 10% weight-loss temperature ( ) ranging from 333 to 397 °C in nitrogen." @default.
• W2334341510 created "2016-06-24" @default.
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• W2334341510 date "2005-09-08" @default.
• W2334341510 modified "2023-09-26" @default.
• W2334341510 title "Facile Synthesis and Characterization of Aromatic and Semiaromatic Hyperbranched Poly(ester−amide)s" @default.
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• W2334341510 doi "https://doi.org/10.1021/ma0511043" @default.
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