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Product Description
3,3-Bis(azidomethyl)oxetane-tetrahydrofuran copolyether (referred to as azide polyether, code name PBT) has a high heat of generation (+874J/g), a low glass transition temperature (-64℃), a high nitrogen content, a high density, a clean gas, a good compatibility with the other components of the propellant and a low mechanical sensitivity, which is an ideal binder for propellant. Azide polyether can give propellant excellent energy performance and good mechanical properties, can reduce the propellant detectable signal, and PBT azide propellant low sensitivity, the use of the binder is one of the important ways to develop a new generation of high-energy, blunt and low characteristic signal solid propellant.
Physical and chemical properties
Structural formula (chemistry):
Solubility: Insoluble in water, slightly soluble in ethanol, soluble in organic solvents such as dichloromethane.
Project name | Norm | Test Methods | |||
| Type | Type I | Type III | Type IV | ||
| View sth from the outside | Light yellow or yellow viscous liquid, no mechanical impurities visible to the eye | Measurement | |||
| Number average molecular weight (×10³) (VPO) | 2000±500 | 4000±500 | 5400±600 | 7000±700 | V PO method |
| Hydroxyyl, mgKOH / g | 45.0～75.5 | 24.0～32.0 | 17.5～24.3 | 14.0～18.0 | Titration |
| Acid value, and mgKOH / g | ≤0.09 | Titration | |||
| Water quality fraction,% | ≤0.07 | Calfee Hugh method | |||
| Nitrogen content,% | 37.0±0.7 | Pyrolysis | |||
Packaging
Packed in 1L closed mouth polyethylene white plastic drums, with the diameter of the mouth of the drum not less than 3mm, the net weight of each drum is 1kg, or according to the customer's requirements for packaging.
Deposits
Room temperature or lower temperature, cool, ventilated place sealed storage, storage temperature range should be (-20 ~ 38) ℃. The storage period of this product is 12 months, after the expiration of the storage period should be re-sampled, in accordance with the requirements of the technical specifications of Part 2 of this article re-inspection, can still be used after passing.
Transportation
During transportation, it should avoid rain, humidity, and sunlight, and should not be mixed with strong oxidizers and acids, and violent collision is prohibited.
