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2,2'-Azobis(2,4-dimethylvaleronitrile) is commonly referred to as V-65 or VAZO 52 in the industry, it is an excellent oil soluble azo initiator. As a highly active product developed on the basis of traditional azobisisobutyronitrile (AIBN), it is specifically designed to address the challenges in medium and low temperature polymerization processes. ABVN can efficiently generate free radicals to initiate chain polymerization, which not only plays a central role in the synthesis of a variety of key polymers, but also is an ideal foaming agent for manufacturing high-performance foam materials.
The main product characteristics as below
Medium-to-Low Temperature Initiation Characteristic
10-hour half-life temperature (T1/2=10h) is around 51℃ (in toluene), decomposition temperature Is around 52℃. It's particularly suitable for polymerization and foaming processes with low temperature.
Stability as solid
It has excellent physical and chemical stability under proper storage conditions.
Simple decomposition product:
The main component is nitrogen gas after decomposition, no metal or acidic residue. What has minimal impact on the color, thermal stability, and electrical properties of the polymer.
Good solvent compatibility
ABVN is insoluble in water but soluble in various organic solvents such as methanol, toluene, acetone and DMF etc. This excellent oil solubility allows it to mix well with most hydrophobic monomers (e.g., vinyl chloride, styrene, acrylates), ensuring uniform distribution in the reaction system. What can help the production with more uniform molecular weight distribution and more stable properties.
Application
Synthesis of Acrylic and Styrenic Polymers
ABVN is an ideal initiator for synthesizing polymethyl methacrylate (PMMA, acrylic glass), polystyrene (PS), and acrylate copolymers. Its mild decomposition conditions help control polymerization rate and exotherm, avoiding polymer yellowing or uncontrolled molecular weight due to local overheating.
Suspension Polymerization of High-End PVC Resin
In PVC suspension polymerization, 2,2'-Azobis(2,4-dimethylvaleronitrile) is the key to make low-temperature,stable, and controllable polymerization. It can effectively initiate reactions at 45-60℃, significantly reducing side reactions like chain transfer of vinyl chloride monomer. This enables the production of high-quality PVC resin with narrower molecular weight distribution, whiter color, fewer "fish eyes," and excellent thermal stability. This resin is the material for producing high-end wire and cable compounds, transparent sheets, and medical products.
Preparation of High-Performance Foamed Plastics and Rubbers
As a high-efficiency chemical foaming agent, ABVN is widely used in preparing microcellular foam materials from PVC, PS, ABS, and rubber. The nitrogen gas bubbles generated from ABVN decomposition are fine and uniform, enabling the production of foam products with dense cell structure, low density, good resilience, and excellent thermal insulation and sound absorption properties. These products are key materials for manufacturing sports mats, sealing strips, insulation layers, and lightweight structural components.
Package & Storage
Package
20 kg drum, or requirement of clients.
Storage
Storage temperature 2-8℃.
Keep away from fire and heat sources. It should be stored separately from acids, reducing agents, flammable substances, combustible substances, reducing agents, etc.
FAQ
Q: What are the unique advantages of 2,2'-Azobis(2,4-dimethylvaleronitrile) over traditional initiators in continuous flow processes?
A: With its well-defined decomposition kinetics and rapid radical generation, ABVN enables precise initiation control in continuous flow reactors, resulting in polymers with narrower molecular weight distributions while eliminating batch-to-batch variations.
Q: How can process design compensate for the short half-life of ABVN (1.5 hours at 70°C)?
A: Implement multi-stage temperature control with pulse addition strategy: Initially add 60% of the total initiator during polymerization. When the conversion reaches 40%, supplement the remaining amount via high-pressure injection while simultaneously reducing the reaction temperature by 5-8°C to balance free radical concentration.
Q: What types of polymerization methods are particularly suitable for this initiator?
A: ABVN demonstrates outstanding performance in both solution and suspension polymerization. Its excellent solvent compatibility ensures uniform distribution within the system, while the nitrogen gas generated during decomposition helps maintain an inert atmosphere, making it particularly suitable for oxygen-sensitive monomer polymerization.
Product Specification