The density of a solid is a conveniently measurable property which is frequently useful as a means of following physical changes in a sample, as an indication of uniformity among samples, and a means of identification.

This test method is designed to yield results accurate to better than 0.05 %.

Note 3—Where accuracy of 0.05 % or better is desired, the gradient tube shall be constructed so that vertical distances of 1 mm shall represent density differences no greater than 0.0001 g/cm.³ The sensitivity of the column is then 0.0001 g/cm³·mm. Where less accuracy is needed, the gradient tube shall be constructed to any required sensitivity.

1. Scope

1.1 This test method covers the determination of the density of solid plastics.

1.2 This test method is based on observing the level to which a test specimen sinks in a liquid column exhibiting a density gradient, in comparison with standards of known density.

Note 1—This test method is equivalent to ISO 1183-2.

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

1.4 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.

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

ISO Standard

Keywords

density; film; gradient; plaque; polyolefins; polyethylene; polypropylene; preparation; Density--plastics; Density-gradient technique;

ICS Code

ICS Number Code 83.080.01 (Plastics in general)

Citing ASTM Standards

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