ASTM D1505 – Standard Test Method for Density of Plastics by the Density-Gradient Technique
Description:
Significance and Use
4.1 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.
4.2 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.
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.
ASTM D1500