Thermal Flow Stability


Test ID

R-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”.

Options

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 [details]

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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