fotodegradace

Fotodegradace is the process by which a substance deteriorates due to exposure to light. This phenomenon is particularly relevant for organic materials, such as plastics, paints, dyes, and pharmaceuticals, which can undergo chemical changes when subjected to ultraviolet (UV) radiation or even visible light over time. The energy from photons can break chemical bonds within the material, leading to changes in its physical properties, color, and overall integrity. For instance, prolonged sun exposure can cause plastics to become brittle and discolored, while dyes can fade.

The rate and extent of fotodegradace depend on several factors, including the intensity and wavelength of the light source, the duration of exposure, and the inherent chemical structure of the material. Different substances have varying degrees of sensitivity to light. Stabilizers and UV absorbers are often incorporated into materials to mitigate the effects of fotodegradace and extend their lifespan. Understanding this process is crucial in industries ranging from material science and manufacturing to preservation of cultural heritage artifacts.