How does the addition of carbon black improve UV resistance in polyethylene?
The addition of carbon black significantly improves the UV resistance of polyethylene by absorbing and scattering harmful ultraviolet (UV) radiation. Carbon black acts as a UV stabilizer, preventing the polymer chains from breaking down due to prolonged sunlight exposure. Its fine particles disperse evenly within the polyethylene matrix, creating a protective barrier that reduces photodegradation. This process not only extends the material's lifespan but also maintains its mechanical properties, making it ideal for outdoor applications like piping, packaging, and construction materials. The higher the concentration of carbon black, the greater the UV protection, though optimal levels must balance performance with cost and processing ease.
