Melt rheology of polyarylate/polybutylene terephthalate blends |
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| Authors: | A. Ausí n,I. Eguiazabal,M. E. Mun oz,J. J. Pe a,A. Santamarí a |
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| Affiliation: | A. Ausín,I. Eguiazabal,M. E. Munñoz,J. J. Peña,A. Santamaría |
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| Abstract: | ![]()
The viscosity, the activation energy of flow, and the exchange reactions of bisphenol A 50/50 isophthalic/terephthalic acid and poly(butylene terephthalate) blends are studied by means of an extrusion capillary rheometer, covering a range of 10 s?1 to 300 s?1 shear rate and 280°C to 300°C temperature. The results are interpreted in terms of compatibility and free volume additivity. The decrease in viscosity with time is explained as a result of transesterification rather than degradation. |
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