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A Rapid, Accurate Technique for Determining Densities of High Explosives

✍ Scribed by P. L. Lagus; P. L. Turner; E. S. Gaffney

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
392 KB
Volume
2
Category
Article
ISSN
0721-3115

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✦ Synopsis

Abstract

An improved gas comparison pycnometer has been developed, based on precise differential pressure measurements coupled with a sample volume compensator. Using helium gas, volumes of solid and powdered explosives can be measured to a precision approaching one part in lo4. Coupled with a precise mass measurement, these volumes allow densities with an uncertainty of ∼± 0.002 g/ml to be inferred. Measurements performed on various explosives have allowed assessment of the purity and homogeneity of individual samples. It is also possible to infer void percentage or porosity in pressed explosive pellets.

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Rapid method for the determination of molecular weight distribution in high polymers: A thermal gradient-turbidity technique
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A rapid method for determining the molecular weight distribution of polymers has been the aim of polymer chemists for a long time. The method presented here requires less tban two hours, including dissolution of the polymer. It is an exteneion of a photoelectric turbidimetric technique presented by