Poly-Schiff bases - IV. Synthesis and characterization of poly(etherazomethine)s

Twelve new poly(etherazomethine)s with linear structures were prepared by a conventional literature procedure by reacting six different diamines with two different bisaldehydes containing ether linkages in the backbone. The r esulting polymers were confirmed by infrared (IR) elemental analysis and vi scosity measurements. The thermal stability of the polymers was evaluated b y thermogravimetry (TG) and isothermal gravimetric (IG) analyses. These pol ymers are reasonably good thermally and thermo-oxidatively stable. A semicr ystalline behavior was noticed for these polymers by X-ray powder diffracti on and differential scanning calorimetry measurements.