Polymer-bonded explosive: Difference between revisions
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Added composition of pbxn-3 85% HMX 15% Nylon ref: http://www.dtic.mil/ndia/2007global_demil/SessionIIIB/1645Johnson.pdf |
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A '''polymer-bonded explosive''', also called '''PBX''' or '''plastic-bonded explosive''', is an [[explosive]] material in which explosive powder is bound together in a matrix using small quantities (typically 5–10% by weight) of a synthetic [[polymer]] ("[[plastic]]"). |
A '''polymer-bonded explosive''', also called '''PBX''' or '''plastic-bonded explosive''', is an [[explosive]] material in which explosive powder is bound together in a matrix using small quantities (typically 5–10% by weight) of a synthetic [[polymer]] ("[[plastic]]"). Note that despite the word "plastic", polymer-bonded explosives are not hand malleable after curing, and hence are not a form of [[plastic explosive]]. |
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PBXs are normally used for explosive materials which are not easily meltable to cast or which are otherwise hard to form. |
PBXs are normally used for explosive materials which are not easily meltable to cast or which are otherwise hard to form. |
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Polymer-bonded explosives have several potential advantages: |
Polymer-bonded explosives have several potential advantages: |
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* If the polymer matrix is an [[elastomer]] (rubbery material), it tends to absorb shocks, making the PBX very insensitive to accidental detonation. |
* If the polymer matrix is an [[elastomer]] (rubbery material), it tends to absorb shocks, making the PBX very insensitive to accidental detonation, and thus ideal for [[insensitive munitions]]. |
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* Hard polymers can produce PBX that is very rigid and maintains a precise engineering shape even under severe stress. |
* Hard polymers can produce PBX that is very rigid and maintains a precise engineering shape even under severe stress. |
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* PBX powders can be pressed into a particular shape at room temperature, when casting normally requires hazardous melting of the explosive. High pressure pressing can achieve density for the material very close to the theoretical crystal density of the base explosive material. |
* PBX powders can be pressed into a particular shape at room temperature, when casting normally requires hazardous melting of the explosive. High pressure pressing can achieve density for the material very close to the theoretical crystal density of the base explosive material. |
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Revision as of 06:27, 28 December 2008
A polymer-bonded explosive, also called PBX or plastic-bonded explosive, is an explosive material in which explosive powder is bound together in a matrix using small quantities (typically 5–10% by weight) of a synthetic polymer ("plastic"). Note that despite the word "plastic", polymer-bonded explosives are not hand malleable after curing, and hence are not a form of plastic explosive.
PBXs are normally used for explosive materials which are not easily meltable to cast or which are otherwise hard to form.
Polymer-bonded explosives have several potential advantages:
- If the polymer matrix is an elastomer (rubbery material), it tends to absorb shocks, making the PBX very insensitive to accidental detonation, and thus ideal for insensitive munitions.
- Hard polymers can produce PBX that is very rigid and maintains a precise engineering shape even under severe stress.
- PBX powders can be pressed into a particular shape at room temperature, when casting normally requires hazardous melting of the explosive. High pressure pressing can achieve density for the material very close to the theoretical crystal density of the base explosive material.
- Many PBXes are safe to machine — to turn solid blocks into complex three-dimensional shapes. For example, a billet of PBX can, if necessary, be precisely shaped on a lathe. This technique is used at nuclear weapons fabrication plants.
| Name | Explosive Ingredients | Binder Ingredients | Usage |
|---|---|---|---|
| EDC-37 | 91% HMX/NC | 9% polyurethane rubber | |
| LX-04-1 | HMX 85% | Viton-A 15% | |
| LX-07-2 | HMX 90% | Viton-A 10% | |
| LX-09-0 | HMX 93% | BDNPA 4.6%; FEFO 2.4% | |
| LX-09-1 | HMX 93.3% | BDNPA 4.4%; FEFO 2.3% | |
| LX-10-0 | HMX 95% | Viton-A 5% | |
| LX-10-1 | HMX 94.5% | Viton-A 5.5% | |
| LX-11-0 | HMX 80% | Viton-A 20% | |
| LX-14-0 | HMX 95.5% | Estane & 5702-Fl 4.5% | |
| LX-15 | HNIS 95% | Kel-F 800 5% | |
| LX-16 | PETN 96% | FPC461 6% | |
| LX-17-0 | TATB 92.5% | Kel-F 800 7.5% | |
| PBX 9007 | RDX 90% | Polystyrene 9.1%; DOP 0.5%; rosin 0.4% | |
| PBX 9010 | RDX 90% | Kel-F 3700 10% | |
| PBX 9011 | HMX 90% | Estane and 5703-Fl 10% | |
| PBX 9205 | RDX 92% | Polystyrene 6%; DOP 2% | |
| PBX 9404 | HMX 94% | NC 3%; CEF 3% | Nuclear Weapons |
| PBX 9407 | RDX 94% | FPC461 6% | |
| PBX 9501 | HMX 95% | Estane 2.5%; BDNPA-F 2.5% | Nuclear Weapons |
| PBX 9502 | TATB 95% | Kel-F 800 5% | Nuclear Weapons |
| PBX 9503 | TATB 80%; HMX 15% | Kel-F 800 5% | |
| PBX 9604 | RDX 96% | Kel-F 800 4% | |
| PBXN-106 | RDX | polyurethane rubber | Naval shells |
| PBXN-3 | RDX 85% | Nylon 15% | AIM9-X Sidewinder Missile |
| PBXN-5 | 95% HMX | 5% fluoroelastomer | Naval shells |
| X-0242 | 92% HMX | 8% polymer |
References
- Cooper, Paul W. Explosives Engineering. New York: Wiley-VCH, 1996. ISBN 0-471-18636-8.
- Norris, Robert S., Hans M. Kristensen, and Joshua Handler. "The B61 family of bombs", 2003.