Polypropylene (PP): Degradation

Degradation

Polypropylene (PP) is liable to chain degradation from exposure to Ultra Violett (UV) radiation such as that present in sunlight. This is one main reason for not using it transparent instead of glass. For external applications, Ultra Violett (UV)-absorbing additives must be used. Carbon black also provides some protection from UV attack. The polymer can also be oxidised at high temperatures, a common problem during moulding operations. Anti oxidants are normally added to prevent polymer degradation.