MIL-PRF-24792A
4.5.3.1.3 Disposition of sample units. Sample units that have been
submitted to group C inspection shall not be shipped.
4.5.3.1.4 Noncompliance. Requirements regarding failure of group C
inspection shall be as identified in the contract (see 6.8.2).
TABLE VI.
Group C inspection.
Inspection
Requirement
Test
Viscosity
3.4.1
4.6.1
Shelf life
3.4.2
4.6.2
Storage temperature
3.4.3
4.6.2
Pot life
3.4.4
4.6.3
Linear shrinkage
3.4.6
4.6.5
Glass transition
3.4.9
4.6.8
temperature
Coefficient of linear
3.4.11
4.6.10
thermal expansion
Temperature
3.4.12
4.6.10
Outgassing
3.4.17
4.6.15
4.6
Methods of inspection.
4.6.1 Viscosity (see 3.4.1). Each adhesive component and the mixed
adhesive shall be tested, using a viscometer, in accordance with ASTM D2393
and table VII or equivalent.
TABLE VII.
Viscometer specifications.
Item tested
Spindle
Speed
Resin
7
20
Hardener
5
4
4.6.2 Shelf life/storage temperature (see 3.4.2 and 3.4.3). The
unmixed adhesive components shall be exposed to a temperature of +85 °C ± 2 °C
for 150 hrs. After exposure, part of the unmixed adhesive components shall be
subjected to the test specified in 4.6.1. The remainder shall be cured in
accordance with 3.4.5, and subjected to the tests specified in 4.6.6, 4.6.7,
4.6.8, and 4.6.15 (space application only).
4.6.3 Pot life (see 3.4.4). Four grams of the mixed material shall be
inserted into a syringe and the requirements of 3.4.4 periodically verified.
4.6.4 Cure schedule (see 3.4.5). The adhesive components shall be
mixed, and cured in accordance with 3.4.5 (see 6.5 and Table VIII). The
quantities of adhesive cured shall be as required to complete the tests
specified in 4.6.5, 4.6.6, 4.6.7, 4.6.8, 4.6.10, and 4.6.11. During cure, the
adhesive shall be subjected to the test specified in 4.6.5. The cured
adhesive shall then be subjected to the tests specified in 4.6.6, 4.6.7,
4.6.8, 4.6.10, 4.6.11, and 4.6.15 (space application only).
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