THERMOGRAVIMETRIC ANALYSIS OF POLYESTERS DERIVED FROM 2,2-BIS(4-CHLOROFORMYL-PHENYL)-PROPANE AND 4,4'-BIPHENYL-DICARBOXYL CHLORIDE

The thermal stability and the kinetic parameters of a series of polyes ters were studied by non-isothermal thermogravimetry. The thermal deco mposition temperatures (TDT) depend principally on the nature of the d iphenols, in the sense that when the bulk of the diphenol is increased , the TDT values decrease. The kinetic parameters, determined using th e Arrhenius relationship, show that these polyesters degrade by a comp lex mechanism or possibly two or more superimposed processes, probably due to the complex structure of both diacids and diphenols.