Dicumyl peroxide

Overview

Structural formula of dicumyl peroxide

Dicumyl peroxide is an organic compound with the formula (C_H_C(CH_)_O)_. It is a white crystalline solid that is used as a radical initiator in the polymerization of styrene, acrylics, and polyethylene.

Chemical Structure

Dicumyl peroxide is a peroxide, which means it contains a peroxide group (_O_O_) in its structure. The compound consists of two cumyl groups (C_H_C(CH_)_) connected by a peroxide linkage. This structure is responsible for its ability to decompose and generate free radicals, which are essential in initiating polymerization reactions.

Applications

Dicumyl peroxide is widely used in the plastics and rubber industries. It serves as a cross-linking agent for polyethylene and polypropylene, improving the mechanical properties and thermal stability of these materials. In the production of polystyrene, dicumyl peroxide acts as a catalyst to initiate the polymerization process.

Safety and Handling

As with many peroxides, dicumyl peroxide is a hazardous material and must be handled with care. It is a strong oxidizing agent and can pose a risk of explosion if not stored properly. Safety measures include storing it in a cool, dry place away from reducing agents and flammable materials.

Decomposition

Upon heating, dicumyl peroxide decomposes to form acetophenone and methane, along with free radicals. This decomposition is exothermic and is the basis for its use as a radical initiator. The decomposition temperature is a critical parameter in its application, as it determines the onset of radical generation.

Related Compounds

• Benzoyl peroxide
• Tert-butyl hydroperoxide
• Cumene hydroperoxide

Related Pages

• Polymer chemistry
• Free radical polymerization
• Cross-linking