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|  MIL-E-82756(OS)
4.6.3.3 PNC. Place the crucible with the residue in a 250-mL beaker. Add about 15 mL of isobutyl
acetate to the crucible. Add enough isobutyl acetate to the beaker to bring the level even with the liquid in
the crucible. Place a watch glass on the beaker. Place the beaker on a hot plate, and heat it to just below
boiling (110C) for 30 minutes, stirring the residue in the crucible periodically. Place the crucible on a
vacuum filtrator to extract the PNC. Pour the remaining hot solvent in the beaker into the crucible, and
aspirate the crucible and residue. Dry the crucible and residue in a 100 5C oven for 15 minutes, and
cool it to room temperature. Weigh the crucible plus second residue.
(Χ Ć )
Ξ 100
Περχεντ šελετιζεδ νιτροχελυλ σ
λ
λ οε
Α
where:
C = Weight of crucible and rod plus residue of 4.6.3.2 in grams
D = Weight of crucible and rod plus second residue in grams
A = Weight of sample in grams
4.6.3.4 AP and aluminum. Determine the percent AP and aluminum as specified in 4.6.2.3.
4.6.3.5 Resorcinol. Determine the resorcinol content as specified in 4.6.2.4 except in step 4.6.2.4f,
use methylene chloride extract from 4.6.3.2 instead of 4.6.2.1. Also, use a 30-mL aliquot instead of a 15-
mL aliquot.
4.6.3.6 EC. Determine the percent EC as specified in 4.6.2.5.
4.6.3.7 MTN and TEGDN. Determine the percent MTN and TEGDN as specified in 4.6.2.6.
4.6.4 Moisture content. The total moisture of the material shall be determined in accordance with
MIL-STD-286, Method 101.5.
4.6.5 Tensile strength.
4.6.5.1 Cut specimens. The tensile properties of the cut PBXN-103 explosive shall be determined in
accordance with CPIA Publication 21 (1983), paragraph 4.3.2.3, with the standard JANNAF die cut from
one-half inch slabs.
4.6.5.2 Cast specimens. The tensile properties of the cast PBXN-103 shall be determined in
accordance with CPIA Publication 21 (1983), paragraph 4.3.2.3, using a dog bone cast to the standard
JANNAF dimensions.
4.6.6 Vacuum stability. The vacuum stability of the PBXN-103 explosive shall be determined in
accordance with MIL-STD-286, Method 403.1.3, except reduce sample size to 1.0 gram, change capillary
arm length to either 15 cm or 26 cm, and change heating time to 48 hours.
4.6.7 Visual examination. Each lot of PBXN-103 shall be visually examined for conformance to 3.4.
4.7 Inspection of packaging. Packaging of PBXN-103 shall be inspected for conformance to section
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