immersion method – specific gravity

density of plastics – immersion method (specific gravity)

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immersion method - specific gravity

immersion method – specific gravity

The most common method for the determination of the density of solid plastics is the immersion method, described in ASTM D 792 and ISO 1183-1. A test specimen is weighed in air and its mass is being recorded. It is then immersed in a liquid and its apparent mass upon immersion is recorded. The specific gravity (mass ratio) and the density (mass ratio x the density of the liquid) is then calculated. The immersion liquid can be either distilled water (Method A) or a liquid lighter than water (Method B) such as ethanol, IPA etc.

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