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The kinetic aspects of the bisphenol‐A polycarbonate‐polyethylene terephthalate exchange reaction are studied. Though the overall mechanism of transesterification is reversible, the kinetics can be treated from a more simple model of two consecutive reactions, due to the decomposition of the alkyl carbonate formed. The values of the kinetic parameters, similar to those obtained for the bisphenol‐A polycarbonate‐polybutylene terephthalate transesterification, suggest that the most likely mechanism is a direct ester–ester interchange reaction which can also be catalyzed by additives such as titanium derivatives.
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Godard et al. (1986) studied this question.
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