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Preparation of aqueous soluble polyamides from renewable succinic acid and citric acid as a new approach to design bio‐inspired polymers
Author(s) -
Jiang Man,
Chen Guangsong,
Lu Ping,
Dong Jian
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39807
Subject(s) - polyamide , aqueous solution , polymer chemistry , hydrolysis , succinic acid , chemistry , polymerization , aspartic acid , organic chemistry , copolymer , citric acid , diamine , amide , succinic anhydride , polymer , amino acid , biochemistry
A novel type of aqueous soluble polyamides were prepared as renewable substitutes for ecologically benign poly(aspartic acid) by polymerization of succinic acid ester and hexamethylene diamine in the presence of citric acid ester. The copolymerization resulted in the formation of poly(amide imide) intermediates, which were hydrolyzed to aqueous solutions of polyamides. The hydrolyzed products were confirmed to be copolymers of succinamide and citramide with COOH side chains, similar to poly(aspartic acid). The polyamides showed strong chelating abilities to Ca 2+ and Pb 2+ metals, comparable to poly(aspartic acid). Interestingly, they also demonstrated antifreeze activities in water by reducing the ice fractions. The polyamides represent a new class of metal chelators and antifreeze protein mimics derived from succinamide and citramide. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 39807.