Abstract
Polyarylates were synthesized by the acidolysis of the diacetates of dihydric phenols with diacids using a melt-polymerization technique. These polymers were characterized by solution viscosity, number-average molecular weight and IR spectra. Thermal stability of these polyarylates were studied by dynamic TG in the presence of air. Relative thermal stabilities were compared at the 50% mass loss of a given polymer (T h value). The data presented revealed that there is a definite relationship between the structure of a polymer chain and their thermo-oxidative stability. TheT h values of some of these polyesters were found to be higher than those reported for highly stable fluoro-carbon polymers (e.g. PTFE). It was observed that the polymers with more cyclic structures in a chain tend to be stiffer and more resistant to deformation. A chain backbone consisting of large number of aromatic groups induced chain stiffening because of chain inflexibility, resonance effects and steric effects.
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Gupta, M.C., Vishnu & Srivastava, A.K. Polyarylates: thermal stability in air. J Mater Sci 19, 347–352 (1984). https://doi.org/10.1007/BF02403220
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DOI: https://doi.org/10.1007/BF02403220