4-Aminobenzoic Acid → Poly(p-phenylene terephthalamide)

Participants

Reaction Steps

To a solution of p-phenylenediamine (31.08 g., 0.287 mole) in a mixture of 360 ml. of hexamethylphosphoramide and 180 ml. of N-methylpyrrolidone-2 is added 3.36 g. of p-aminobenzoic acid, using water bath cooling. To this cooled solution is added terephthaloyl chloride (60.90 g., 0.300 mole.) The reaction mixture is stirred overnight, then combined with water in a blender to precipitate polymer. The product is washed with water and dried in a vacuum oven at 65° C. The product is then combined with acetone in a blender, the mixture filtered, and the product collected and dried at 65° C. in a vaccum oven. There is obtained a quantitative yield of poly(p-phenylene terephthalamide) (ηinh=1.32).

Provenance & Evidence