Abstract
Abstract The direct synthesis of poly(p-phenyleneterephthalamide) has been successfully performed by polymerizing its dimer, N-(4-aminophenyl)terephthalamic acid, instead of p-phenylenediamine and terephthaloyl chloride or terephthalic acid, as commonly carried out. An intrinsic viscosity much higher than those typical of the commercial fibres (Kevlar®) has been obtained. The procedure and the advantages of the method are highlighted.
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