Rides, M; Allen, C R G (2001) Effect of die geometry on shear viscosity and entrance pressure drop determination by capillary extrusion rheometry. NPL Report. MATC(A)56

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Abstract

This report addresses the effect that the choice of die geometry has on shear viscosity and entrance pressure drop values determined by capillary extrusion rheometry. A number of thermoplastics have been tested including a fibre-filled material and conclusions are presented as to the acceptability of certain specified die geometries for shear viscosity and entrance pressure drop measurement. These results have been used as supporting evidence to enable recommendations to be made for the development of the capillary extrusion rheometry standard ISO 11443.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	MATC(A)56
Keywords:	capillary extrusion, rheometer, rheometry, thermoplastics, plastics, shear viscosity, entrance pressure drop
Subjects:	Advanced Materials Advanced Materials > Polymers
Last Modified:	02 Feb 2018 13:17
URI:	http://eprintspublications.npl.co.uk/id/eprint/2105

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