MIL-L-82653A(OS)
|
Material |
Specification |
Weight Percent |
||
Type I |
Type II |
Type III |
||
Liquid Polymer, CTPB |
MIL-P-82658 |
83.312 |
— |
86.814 |
Linear CTPB |
MIL-P-23942 Type II |
— |
87.84 |
— |
Carbon Black |
DOD-C-82665 |
— |
8.86 |
6.2325 |
Carbon Black, Thermal |
DOD-C-82656 |
10.00 |
||
Chromium 2-Ethyl Hexoate |
DOD-C-82660 |
0.124 |
— |
0.0205 |
Epoxy Resin, Trifunctional |
MIL-R-82657 |
6.564 |
— |
6.933 |
Tris-1-(2-Methyl Aziridinyl) Phosphine Oxide |
DOD-T-82666 Grade B |
— |
3.30 |
— |
3.3 Modification of liner formulation.
3.3.1 Modification of Type I liner formulation. The properties of the Type I liner may be varied by changing the ratio of epoxy resin to polybutadiene. The total weight percent of epoxy resin, catalyst, and polybutadiene must remain constant at 90.0 percent.
3.3.2 Modification of Type II liner formulation. The properties of the Type II liner may be varied by changing the ratio of Tris-1-(2-Methyl Aziridinyl) Phosphine Oxide to polybutadiene. The total weight percent of Tris-1-(2-Methyl Aziridinyl) Phosphine Oxide and polybutadiene must remain constant at 91.14 percent.
3.3.3 Modification of Type III liner formulation. The properties of the Type III liner may be varied by changing the ratio of epoxy resin to polybutadiene. The total weight percent of epoxy resin, catalyst, and polybutadiene must remain constant at 93.7675 percent.
3.4 Propellant-to-liner bond strength. Propellant-to-liner bond strength testing shall be required before a new liner ingredient lot set or liner formulation modification (see 4.3.1) is used. the propellant-to-liner bond shall exhibit cohesive failure in the propellant web when tested at 77 ± 5•F.
3.5 Workmanship. The material shall be uniform and free from contamination and foreign material that would prevent its use for the purpose intended.
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set
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