MIL-PRF-24793A
4.6.3 Cure schedule (see 3.5.4). The adhesive shall be cured in accordance
with 3.5.4. The quantities of adhesive cured shall be as required to complete
the tests specified in 4.6.4, 4.6.5, 4.6.6, 4.6.7, 4.6.9, and 4.6.10. During
cure the adhesive shall be subjected to the test specified in 4.6.4. The
cured adhesive shall be subjected to the tests specified in 4.6.4, 4.6.5,
4.6.6, 4.6.7, 4.6.9, and 4.6.10.
4.6.4 Linear shrinkage (see 3.5.5). The adhesive shall be tested in
accordance with ASTM D2566 or equivalent.
4.6.5 Hardness (see 3.5.6). A 24 gm slab of cured adhesive shall be tested
in accordance with ASTM D2240.
4.6.6 Bond strength (see 3.5.7). The cured adhesive shall be tested in
accordance with ASTM D1002 using glass plates. The glass plates shall be
cleaned with alcohol or acetone prior to application of the adhesive.
4.6.7 Glass transition temperature (see 3.5.8). The cured adhesive shall
be tested in accordance with ASTM D3418 using a differential scanning
calorimeter, or equivalent.
4.6.8 Index of refraction (see 3.5.9).
The adhesive shall be tested in
accordance with ASTM D542 or equivalent.
4.6.9 Coefficient of linear thermal expansion (see 3.5.10 and 3.5.11). The
cured adhesive shall initially be soaked at both -40OC and +70OC for one hour.
The cured adhesive shall then be tested in accordance with ASTM D696 or
equivalent. The test shall be performed at 11 approximately equally spaced
temperatures spanning the operating temperature range specified in 3.5.11.
4.6.10 Water absorption (see 3.5.12). The cured adhesive shall be tested
for 24 hours in accordance with ASTM D570 or equivalent.
4.6.11 Identification and marking (see 3.5.13). The adhesive containers
shall be visually examined for conformance with the requirements of 3.5.13.
4.6.12 Workmanship (see 3.5.14). The adhesive components shall be visually
examined for conformance with the requirements of 3.5.14.
4.6.13 Splice compatibility (see 3.5.15). The adhesive shall be used in
the assembly of a 62.5/125/900 µm optical fiber into a glass ferrule
mechanical fiber splice. The splice shall be assembled in accordance with the
manufacturer's instructions, except that the adhesive shall be cured in
accordance with 3.5.4 and the splice shall not be attached to the 900 µm fiber
using mechanical methods. Note: Finely polished splice faces will allow more
accurate fiber position measurements (see 4.6.13.1 and 4.6.13.3). The splice
assembly shall be exposed to the tests specified in 4.6.13.1, 4.6.13.2, and
4.6.13.3 in the order shown.
4.6.13.1 Thermal shock. The splice assembly shall be tested in accordance
with TIA/EIA-455-71 using test condition
C-0. The high and low temperature extremes shall be -40OC and +70OC,
respectively. Before the test, the splice assembly shall be examined for
fiber position using a profilometer or an optical interferometer.
4.6.13.2
Temperature/humidity cycling.
The splice assembly shall be tested
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