Polyamides heteroaromatic

The search for new pol3nneric materials having useful properties has been made by developing new mixtures of old materials, as pol3nner blends or copolymers, or by the development of new polymer backbones. In this paper we describe the S3mthesis and properties of an unusual heteroaromatic polyamide derived from the cyanoimidazole nucleus. 

The introduction of heteroaromatic units into polymer backbones has played a major role in the advancement of high performance materials. This strategy has resulted in a number of aromatic heterocyclic polymers and aromatic-heteroaromatic polyamides. For example, Marvel s preparation of polybenzimidazole or Kvenzel s work in which oxadiazole rings were incorporated in aromatic polyamides. We now report the preparation of poly(imidazoleamides), a new class of heteroaromatic polyamides based on cyanoimidazoles. 

Poly(imidazole)amides, a new class of heteroaromatic polyamides, were prepared from the polymerization of amino acids and acid chlorides to yield low to moderate molecular weight polymers. These materials are thermally stable in excess of 300°C, under nitrogen atmosphere Presently, we are investigating methods to increase molecular weights of these polymers as well as preparing new AB monomers, as shown below. 

It has often been proclaimed that 5-hydroxymethylfurfural (HMF, Fig. 8.35) could be an ideal cross-over compound between carbohydrates and petrochemistry [184], as it is a bifunctional heteroaromatic compound that is accessible from fructose in one step. It was expected that HMF could be developed into a valuable synthetic building block and that its derivatives, such as furan-2,5-dicarb-oxylic acid (FDA), would be able to compete with fossil-derived monomers for use in thermostable polyesters and polyamides. 

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