The use of activated bis-pentachlorophenyl esters of dicarboxylic acids in synthesis of polyamides

The possibility of synthesis of polyamides of high molecular weight by the use activated bis-pentachlorophenyl esters of dicarboxylic acids in low-temperature poly-condensation has been studied. Polyamides with η sp/ c=0·31−1·04 dl/g were obtained. It was shown that tertiary amines catalyse polycond...

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Bibliographic Details
Published in:Polymer science USSR 1979, Vol.21 (12), p.2978-2984
Main Authors: Katsarava, R.D., Kunchuliya, D.P., Avalishvili, L.M., Andronikashvili, G.G., Zaalishvili, M.M.
Format: Article
Language:English
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Summary:The possibility of synthesis of polyamides of high molecular weight by the use activated bis-pentachlorophenyl esters of dicarboxylic acids in low-temperature poly-condensation has been studied. Polyamides with η sp/ c=0·31−1·04 dl/g were obtained. It was shown that tertiary amines catalyse polycondensation of these esters with aliphatic diamines only. It was found that in solution in hexamethylphosphortriamide, pentachlorophenol undergoes almost no reaction with an aromatic diamine, but it forms a stable complex with an aliphatic diamine. A method of preparation of activated bis-pentachlorophenyl esters directly from dicarboxylic acids and pentachlorophenol in the presence of dicyclohexylcarbdi-imide or trifluoroacetic anhydride, is proposed.
ISSN:0032-3950
1878-268X
DOI:10.1016/0032-3950(79)90130-8