Synthesis of hyperbranched P poly(glycerol-diacid) oligomers |
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Authors: | Victor T Wyatt Alberto Nuñez Thomas A Foglia William N Marmer |
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Affiliation: | (1) ARS Eastern Regional Research Center, USDA, 19038 Wyndmoor, Pennsylvania |
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Abstract: | Novel oligomeric prepolymers were synthesized by acid-catalyzed condensation of glycerol with iminodiacetic, azelaic, or succinic
acid. The prepolymers were obtained, on average, in 62% yield and were characterized by 13C NMR, 1H NMR, matrix-assisted laser desorption ionization-time of flight-mass spectrometry, and gel permeation chromatography. The
synthesized oligomers had an average M.W. of 1543 Daltons (average polydispersity (PD)=1.34, average degree of polymerization
(DOP)=5.5). Hyperbranching was evident in the oligomers produced when using azelaic acid and succinic acid as co-monomers
with glycerol, whereas the reaction between iminodiacetic acid and glycerol resulted in linear products bearing cyclic urethane
structures. |
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Keywords: | Diacids glycerol hyperbranching polymers |
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