Vazo™ 64, also known as azobisisobutyronitrile (AIBN), is a free radical initiator used to initiate the polymerization of specialty polymers.
Vazo™ 64 is an azonitrile-based compound (AIBN) that decomposes when exposed to heat or light to form nitrogen gas and free radical intermediates. Its most common use is as a radical initiator in free radical polymerization reactions to produce polymers with low branching, cross-linking, and polydispersity. Vazo™ 64 is not sensitive to pH, will not undergo redox reactions, and can be mixed with several other initiators without undergoing radical-induced decomposition.
In addition, Vazo™ 64 generates free radicals that do not abstract hydrogen from growing polymer chains, giving chemists more control over the polymerization reaction and the polymer’s final structure and molecular weight. Vazo™ 64 is generally safer than organic peroxide initiators and can produce polymer structures with higher specificity.
Like other Vazo™ grades, the number in the grade name indicates the 10-hour half-life temperature. Therefore, Vazo™ 64 has a 10-hour half-life in solution at 64°C and is recommended for polymerizations that occur at 45°C–90°C. However, it is possible to use it outside of this range. Vazo™ 64 should be transported and stored away from light, flames, and ignition sources at a maximum of 24°C to ensure product quality and safety.
Molecular weight (g/mol): 162.21
Appearance: White noodles
Purity (%, min): 98.0
Water (wt%, max): 0.5
Acetone insolubles (wt%, max): 0.1
Color, APHA (max): 15
Iron (ppm, max): 20
CAS number: 78-67-1
Primary Chemistry: Azobisisobutyronitrile (AIBN)
Primary Chemistry: Azobisisobutyronitrile (AIBN)
Free radical source
Decomposition is not pH sensitive
Allows for higher control of polymerization and polymer structure
Safer than other common radical initiators, such as organic peroxides
Will not undergo redox reactions
Can be mixed with other radical initiators without undergoing radical-induced decomposition
Poor polymerization reaction yield
Generation of color-forming impurities during polymerization
Polymer-chain defects
Branching and cross-linking during polymerization
Health and safety hazards associated with using organic peroxide initiators
Coatings
Inks
Water treatment chemicals
Electronics
Personal care
Paper
Textiles
Chemical intermediates
Specialty chemicals
Vazo™ Free Radical Initiators are a line of azonitrile compounds that are ideally suited for safely & efficiently initiating free radical polymerizations.
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