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M. Mucha

Glass transition and thermal stability of blends composed of polycarbonate and poly(ethylene terephthalate)

Polimery 1982, No 4, 153

DOI: dx.doi.org/10.14314/polimery.1982.153


Dilatometric investigations revealed that blends composed of polycarbonate (Makrolon) and poly(ethylene terephthalate) (Elana) are heterogeneous systems. There exist however interactions of the two components revealed in the changes of the glass transition point, Tg, of both polymers in the blend, their specific heat expansion and thermal stability. The thermogravimetric determinations have shown that blends decompose at a temperature lower than those of both components taken separately and this decomposition is connected with a higher weight loss than that resulting from the additivity of the individual components contribution. This fact can be explained by a negative effect of the products of decomposition of the less stable poly(ethylene terephthalate) on the rate of decomposition of polycarbonate.

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