Synthesis of bis-N-acyllactams type chain extenders for polyesters and polyamides

摘要

This article shows the synthesis of chain extenders derived from the group of bis-N-acyllactams. These chain extenders may not only increase the molecular weight of polyesters or polyamides but also permit a flexible modification at the same time by incorporating an arbitrary functionality in the polymer chains. The chain extenders are synthesized by a two step process starting from terephthaloyl chloride, epsilon-caprolactam, and the functional moiety R which derives from a diol HO-R-OH or diamine H2N-R-NH2. For five chain extenders varying in the moiety R, the synthesis is explicitly shown and the thermal stability is investigated. It can be shown that the chain extenders are thermal stable up to 260 degrees C at least. The chain extenders may thus be useful to increase the molecular weight and to modify many important thermoplastic polyesters and polyamides during the melt extrusion process. (C) 2007 Wiley Periodicals, Inc.