Synthesis, thermal and optical properties of nanosized polyamides containing N-phenyl- and N-naphthyl-s-triazine rings: Structure-properties correlation

ABSTRACTWe prepared two series of nanosized polymers containing s-triazine moiety by reactions of newly prepared substituted diacids chlorides derived from 2-anilino-4,6-di-(phenoxy)- and 2-(N-1-naphthylamine)-4,6-di-(phenoxy)-s-triazines with a number of commercial diamines. The polymers were carefully characterized by different techniques including infrared, ultraviolet, fluorescent emission, elemental and thermal analyses and scanning electron microscopy (SEM). The SEM images indicated that most of the polyamides were organized as well defined nano sized spheres, but in certain derivatives small amount of aggregated nanospheres was also observed. Structure-property correlations based on a single or more interchange proved to be feasible. The polymers exhibited high thermal behavior and, based on the produced char yields, the limiting oxygen index (LOI) indicated that a dozen polymers were classified as “slow burning polymers” while the other dozen polymers were “self-extinguishing polymers.” Polymers d...