antiozonant

Antiozonant is a chemical additive used to protect materials, particularly rubber and plastics, from degradation caused by ozone. Ozone is a highly reactive gas present in the atmosphere that can attack the carbon-carbon double bonds found in many polymers, leading to chain scission, cracking, and loss of physical properties. This process is known as ozone attack or ozone cracking.

Antiozonants work by scavenging ozone molecules before they can react with the polymer backbone. They achieve this through various mechanisms, often involving chemical reactions that consume the ozone or form protective layers on the surface of the material. Common types of antiozonants include aromatic amines and phenolic compounds. The effectiveness of an antiozonant depends on its concentration, the type of polymer it is used with, and environmental conditions such as temperature and ozone concentration.

These additives are crucial in extending the service life of a wide range of products, including tires, hoses, belts, seals, and electrical insulation. Without antiozonants, many rubber and plastic components would fail prematurely, leading to safety hazards and increased maintenance costs. The choice of antiozonant is often a balance between performance, cost, and potential environmental or health impacts. Research continues to develop more effective and sustainable antiozonant solutions.