THERMOGRAVIMETRIC ANALYSIS OF POLYCARBONATES AND POLYTHIOCARBONATES WITH CHLORINE ATOMS

The thermal stability and kinetics parameters of polycarbonates and po lythiocarbonates derived from diphenols with chlorine atoms in the aro matic rings were studied, showing that polycarbonates have a higher th ermal stability than the polythiocarbonates. All polymers degraded in a single stage in the considered temperature range, and the kinetics p arameters were determined by using the Arrhenius relationship and a co mputer program. Polycarbonates degraded by a zero order kinetics, whil e polythiocarbonates by a first order kinetic.