Abstract
A new facile method for the rapid synthesis of aliphatic polyamides was developed by using a domestic microwave oven by the polycondensation of both ω-amino acids and nylon salts in the presence of a small amount of a polar organic medium that acts as a primary microwave absorber. Suitable organic media were tetramethylene sulfone, amide-type solvents such as N-cyclohexyl-2-pyrrolidone and 1,3-dimethyl-2-imidazolidone, and phenolic solvents like m-cresol and o-chlorophenol. The polycondensation proceeded rapidly, compared with the conventional melt polycondensation, and was almost complete within 5 min, producing a series of polyamides with inherent viscosities around 0.5 dl g−1.
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Imai, Y., Nemoto, H., Watanabe, S. et al. A New Facile and Rapid Synthesis of Aliphatic Polyamides by Microwave Assisted Polycondensation of ω-Amino Acids and Nylon Salts. Polym J 28, 256–260 (1996). https://doi.org/10.1295/polymj.28.256
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DOI: https://doi.org/10.1295/polymj.28.256
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