Vazo™ 88 is an oil-soluble, azonitrile free radical initiator used for initiating high-temperature bulk, solution, and suspension polymerizations.
Vazo™ 88 is a substituted azonitrile compound that decomposes when exposed to heat or light to form nitrogen gas and free radical intermediates, which initiates free radical polymerization. Compared to other Vazo™ free radical initiators, Vazo™ 88 is optimized for higher-temperature reaction conditions. Like other azonitrile initiators, Vazo™ 88 is unaffected by pH, does not undergo redox reactions, and does not decompose in the presence of free radicals. This makes Vazo™ 88 easier to use because fewer chemical reaction conditions need to be met to initiate polymerization effectively. Unlike organic peroxides, free radicals generated by Vazo™ 88 will not abstract hydrogen from growing polymer chains and can produce specialty polymers with minimal chain defects, branching, and cross-linking.
Vazo™ 88 has the highest thermal stability of the Vazo™ free radical initiators. It is most useful in polymerization reactions that require high temperatures to create polymers and chemical compounds used in a variety of industries, including transpiration, water treatment, construction, medicine, and personal care. It is also much safer than organic peroxide initiators and offers chemists more control over reaction conditions and final polymer structure. Vazo™ 88 may also be used as a chemical blowing agent for specialty foam applications. It has a 10-hour half-life at 88°C and should be stored away from light and ignition sources below 50°C to ensure product quality and safety.
Molecular weight, g/mol: 244.33
Appearance: White, crystalline solid
Purity, min %: 98.0
Water, max wt%: 0.5
Acetone insolubles, max wt%: 0.15
APHA color, max: 25
Iron, max ppm: 20
Primary Chemistry: 1,1'-azobis(cyanocyclohexane)
Excellent source of free radicals for polymerization initiation
High degree of solubility in organic solvents
Offers superior control over reaction conditions and final polymer structure
Safer than organic peroxide initiators
Useful in high-temperature reactions
Unaffected by pH
Will not react with dyes, pigments, or other redox reagents; requires fewer reaction conditions to maximize polymerization yield
Can be blended with other initiators
Poor yield of polymerization reactions
Rapid decomposition of free radicals in high-temperature polymerizations
Health and safety concerns regarding organic peroxides
Branching, cross-linking, or chain defects brought forth by using other initiators that abstract hydrogen from growing polymer chains
Industrial and automotive coatings: Ideal for producing resins that create durable paints and coatings with high durability and nonyellowing properties
Marine paints: Provides robust durability qualities in resins used for coating formulations in harsh marine environments
Adhesives and sealants: Facilitates the production of resins that create strong bonding in various adhesive and sealant formulations
Packaging materials: Used to create resins involved in creating water-soluble films for packaging
Textile coatings: Improves durability and performance of textile finishes
Pharmaceutical applications: Supports the development of drug delivery systems through polymerization techniques
Electronics manufacturing: Used in creating plastics used for electronic components to provide protection and insulation without oxygen-containing groups or metal contaminates
3D printing materials: Initiates polymerization processes for materials used in additive manufacturing
Composite materials: Improves the performance characteristics of composite materials used in aerospace and automotive sectors
Vazo™ is a line of azo initiators ideally suited for safely and efficiently initiating free radical polymerizations.
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