1. Scope

1.1 This test method covers the use of a screw-extrusion-type capillary rheometer for the measurement of flow properties of thermoplastics and thermoplastic compounds. The measured flow properties, which are obtained through laboratory investigation, may help to describe the material behavior that occurs in factory processing.

1.2 Since a screw-type capillary rheometer imparts shear energy to the material during testing, the measurements will usually differ from those obtained with a piston-type capillary rheometer (see Test Method D3835).

1.3 Capillary rheometer measurements for thermoplastics and thermoplastic compounds are described in Test Method D3835.

1.4 The values stated in SI units are to be regarded as standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Note 1--There is currently no equivalent ISO standard.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D618 Practice for Conditioning Plastics for Testing

D883 Terminology Relating to Plastics

D1238 Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer

D3835 Test Method for Determination of Properties of Polymeric Materials by Means of a Capillary Rheometer

E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

Keywords

capillary rheometer; flow properties; material properties; molecular properties; rheological properties; rheology; screw extrusion; Capillary rheometer method; Flow and flow rate--thermoplastics; Material properties; Molecular properties; Rheology/rheological properties; Screw-extrusion capillary rheometer; Shear testing--plastics; Thermoplastics;

ICS Code

ICS Number Code 83.080.20 (Thermoplastic materials)

DOI: 10.1520/D5422-00

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