Thermal Flow StabilityR-015

Description

This test determines the change in viscosity of a plastic as a function of time.  The sample, dried if needed, is loaded into a preheated test barrel of a capillary rheometer.  The viscosity is measured at regular time intervals at a constant shear rate, and the resulting data are presented as a curve.  Where possible, data are extrapolated back to zero time to provide an estimate of an “intrinsic viscosity”.

Standards

• ASTM D3835

Data

Melt Flow Stability. This data appears in Matereality as Capillary Viscosity.

Replicates

Number of times this test is repeated: 1

Samples

0.5 kg of pellets

Application

This test yields important information about the thermal stability of plastics. It provides an outer limit on barrel residence times in extrusion and molding applications.

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