Product Introduction
Executive standard: GJB 8134-2013
English name: 3,3 '- bis (azidothyll) oxetane/tetrahydrofuran copolymer (PBT)
Chinese alias: azide polyether, azide glue, 3,3-bis (azide methyl) epoxybutane
Physical and chemical properties
1.1 Solubility: insoluble in water, slightly soluble in ethanol, soluble in organic solvents such as dichloromethane
1.2 Structural formula: Chemical formula of tetrahydrofuran copolymer ether
Technical indicators
entry name
Tetrahydrofuran copolymer ether
test method
Type I, II, III, IV
Hydroxyl value, mmol/g
45.0-75.5
24.0-32.0
17.5-24.3
14.0-18.0
Titration method
Water mass fraction,%
≤ 0.07
Karl Fischer method
Acid value, mgKOH/g
≤ 0.09
Titration method
Number average molecular weight (VPO)
2000 ± 500
4000 ± 500
5400 ± 600
7000 ± 700
VPO method
Nitrogen content,%
37 ± 0.7
Combustion decomposition method
exterior
Light yellow or yellow viscous liquid with no visible mechanical impurities
Visual inspection
Product Usage
3,3-bis (azide methyl) oxocyclobutane tetrahydrofuran copolyether (PBT for short) has a high heat of formation (+874J/g), low glass transition temperature (-64 º C), high nitrogen content, high density, clean gas, good compatibility with other components of propellants, low mechanical sensitivity, and is an ideal adhesive for propellants. Azide polyether can endow propellants with excellent energy and mechanical properties, reduce detectable signals, and have low sensitivity in PBT azide propellants. The use of this adhesive is one of the important ways to develop a new generation of high-energy, insensitive, and low characteristic signal solid propellants.
packing of products
1L closed polyethylene white plastic drum packaging, with a drum mouth diameter of no less than 3mm and a net weight of 1kg per drum, can also be packaged according to customer requirements.
Storage method
Store at room temperature or lower, in a cool and ventilated place, with a storage temperature range of (-20 to 38) ℃. The storage period is 12 months, and it can still be used if it expires and passes the retest.
Product transportation
During transportation, it is necessary to avoid rain, dampness, and exposure to sunlight. It should not be mixed with strong oxidants or alcohol substances, and violent collisions are prohibited.
China
