Density by Pycnometry. In a pycnometer, the volume of the polymer is determined by the displacement of a liquid or gas. A special container, made of soda glass to avoid static charges, typically is used for the experiment 55.For our purposes a ground-glass stoppered 25.00-mL Erlenmeyer flask will suffice.ivide through by the mass of the polymer. The mass ratios are the percent by mass of the amorphous and crystalline phases, expressed as decimal fractions. Assuming that the polymer is a two-phase system, the sum of the percents should be 1.
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