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Alternate uncured PBXN-109 analytical procedure |
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|  MIL-E-82886(OS)
c.
Dry the sample for 30 minutes between 90 and 100C, cool and weigh.
d.
Calculate the percent binder as follows:
Α
Β
⋅ 100
Περχεντ βινδερ
Χ
where:
A = Weight of crucible plus sample, (g)
B = Weight of crucible plus residue, (g)
C = Weight of sample, (g)
e.
Extract residue remaining on the crucible with 5 portions, 10 mL each, of the hot acetone
(approximately 50C) on a vacuum filtrator. Stir each extraction for 30 seconds with vacuum
off.
f.
Dry sample for 30 minutes between 90 and 100C, cool and weigh.
g.
Calculate the percent RDX as follows:
Ć
Ε
⋅ 100
Περχεντ ΡĆ Ξ
Χ
where:
D = Weight of crucible plus residue before acetone extraction, (g)
E = Weight of crucible plus residue after acetone extraction, (g)
C = Weight of sample, (g)
h.
Calculate the percent aluminum as follows:
Περχεντ αλ ινυ
υ
100%
(% βινδερ
% ΡĆ Ξ)
4.6.5.4 Alternate uncured PBXN-109 analytical procedure. In the following procedure, the
solvent shall be either dry cleaning solvent, P-D-680, Type II, or n-heptane, reagent grade. Analyze one
top and one bottom specimen in duplicate.
a.
Weigh approximately 2 g, to the nearest 0.1 mg, of the specimen into a tared, fine porosity
fritted glass crucible with a glass stirring rod.
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