Abstract
The thermal stability and the kinetic parameters of three polycarbonates derived from biphenols with aromatic side groups, were studied using dynamic thermogravimetry. The kinetics data showed that for polycarbonate I there is a two-step decomposition, the first step being of zero order and the second of first order, indicating the possibility of two different decomposition mechanisms. Polycarbonate II shows a one-step decomposition which does not depend on the molecular weight. Polycarbonate III shows a decomposition which is dependent on the molecular weight; samples with low molecular weight show a zero-order reaction and high molecular weight species show a first-order reaction, indicating that there are two different decomposition mechanisms. The mechanism of the thermal decomposition of these polycarbonates could be similar to that reported by Davis and Golden for bisphenol A polycarbonate.
Published Version
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