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Updated: Jan 2, 2026

Characteristics of Precipitation-formed Polyethylene Glycol Microgels Are Controlled by Molecular Weight of Reactants
Published on: December 23, 2013
Density of Polyethylene Crystals Grown From Solution
Gordon M Martin1, Elio Passaglia1
1Institute for Materials Research, National Bureau of Standards, Washington, D.C.
Abstract:
The density of Marlex 50 polyethylene crystals grown from a 0.75 percent solution in p-xylene at 70 °C was measured by a pycnometric method. Difficulties in making the measurements to the necessary accuracy are discussed. The values obtained were close to 0.98 g/cm3 at 30 °C and significantly less than the crystallographic density of 1.00 g/cm3. Several possible explanations of this density deficiency are mentioned.
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