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• W4367060210 abstract "In this study, poly(glycerol-co-diacids) prepolymers were produced using different ratios of glycerol (G), sebacic acid (S), and succinic acid (Su) (molar ratios: GS 1:1, GSSu 1:0.9:0.1, GSSu 1:0.8:0.2, GSSu 1:0.5:0.5, GSSu 1:0.2:0.8, GSSu 1:0.1:0.9, GSu 1:1). All polycondensation reactions were performed at 150 °C until reaching a degree of polymerization of ≈55%, inferred by the water volume collected from a reactor. We concluded that the reaction time is correlated with the ratio of diacids used, that is, the increase in succinic acid is proportional to a decrease in the duration of the reaction. In fact, the reaction of poly(glycerol sebacate) (PGS 1:1) is twice as slow as the reaction of poly(glycerol succinate) (PGSu 1:1). The obtained prepolymers were analyzed by electrospray ionization mass spectrometry (ESI-MS) and 1H and 13C nuclear magnetic resonance (NMR). Besides its catalytic influence in poly(glycerol)/ether bond formation, the presence of succinic acid also contributes to a mass growth of ester oligomers, the formation of cyclic structures, a greater number of oligomers detected, and a difference in mass distribution. When compared with PGS (1:1), and even at lower ratios, the prepolymers produced with succinic acid presented mass peak characteristics of oligomer species with a glycerol unit as its end group in higher abundance. Generally, the most abundant oligomers have molecular weights between 400 and 800 g/mol." @default.
• W4367060210 created "2023-04-27" @default.
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• W4367060210 date "2023-04-26" @default.
• W4367060210 modified "2023-10-14" @default.
• W4367060210 title "Synthesis of Prepolymers of Poly(glycerol-<i>co</i>-diacids) Based on Sebacic and Succinic Acid Mixtures" @default.
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• W4367060210 doi "https://doi.org/10.1021/acsomega.3c00648" @default.
• W4367060210 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37179609" @default.
• W4367060210 hasPublicationYear "2023" @default.
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