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Capillary extrusion behavior of phenolphthalein poly(ether-ether-sulphone) (PES-C)

✍ Scribed by Yingwei Di; Domenico Acierno; Alberto D'Amore; Rossella Nobile; Luigi Nicolais

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 161 KB
Volume: 65
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19970801)65:5<951::aid-app13>3.0.co;2-v

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✦ Synopsis

The capillary extrusion flow properties of novel engineering thermoplastic phenolphthalein poly(ether-ether-sulphone) (PES-C) have been investigated using capillary rheometer. The dependence of viscosity on the wall shear rate and temperatures were obtained. The flow activation energy was found to decrease with shear rate but to be constant with shear stress. The entrance effect was calculated and from which the extensional behavior was estimated using Cogswell's method. From the extrudate swell ratio the principal normal stress was evaluated and a temperature-independent correlation was observed when they were plotted against shear stress. The melt fracture phenomena were checked and discussed also.

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