Abstract
Direct polycondensation reactions of various nylon salts prepared from diamines and dicarboxylic acids were carried out under mild conditions with triphenylphosphine and halides. Reaction conditions including the monomer concentration, amount of reagents, kind of halides, solvents and organophosphorus compounds, and temperature were investigated. A combination of triphenylphosphine and tetrabromomethane was found to be satisfactory for the aliphatic polyamide synthesis. Nylon 6, 10 having the highest molecular weight was obtained with the molar ratio of triphenylphosphine/tetrabromomethane/carboxyl groups of the monomer = 1.5/1.5/1.0 in pyridine at 40°C.
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Ogata, N., Sanui, K. & Tan, S. Synthesis of Aliphatic Polyamides by Direct Polycondensation with Triphenylphosphine. Polym J 16, 569–574 (1984). https://doi.org/10.1295/polymj.16.569
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DOI: https://doi.org/10.1295/polymj.16.569
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