Thermal analysis of poly(1,3,4‐oxadiazole‐2,5 diyl‐1,2‐ethenediyl) and poly(1,4‐phenylene‐1,3,4‐oxadiazole‐2,5 diyl‐1,2 ethendiyl)

摘要

AbstractPoly(1,3,4‐oxadiazole‐2,5‐diyl‐1,2‐ethendiyl) and poly(1,4‐phenylene‐1,3,4‐oxadiazole‐2,5 diyl‐1,2‐ethenediyl) have been prepared by condensation polymerization using fuming sulfuric acid and different quantities of terephthalic acid (T), fumaric acid (F), and hydrazine sulfate (HS). Homopolymers of F and T and various copolymers of F:T have been prepared. The polymer structure was investigated by IR and visible‐range spectra and elemental analysis. The existence of poly(1,3,4‐oxadiazole‐diylphenylene) and poly(hydrazoterephthaloyl) structures was revealed by these studies. These polymers were thermally stable, and most of them did not show a weight loss below 350°C. The relative thermal stabilities of the various polymers have been evaluated by “integral procedural decomposition temperature” an