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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)
Author(s) -
Varma I. K.,
Geetha C. K.
Publication year - 1975
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1975.070191022
Subject(s) - oxadiazole , terephthalic acid , sulfuric acid , polymer chemistry , materials science , polymerization , thermal decomposition , polymer , phenylene , condensation polymer , hydrazine (antidepressant) , chemistry , organic chemistry , polyester , composite material , chromatography , metallurgy
Poly(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” and activation energy measurements.