What are the effects of prolonged sun exposure on resin’s chemical stability in sculptures?

Prolonged sun exposure can significantly impact the chemical stability of resin in sculptures. Ultraviolet (UV) rays from sunlight cause photodegradation, leading to discoloration, brittleness, and surface cracking over time. The polymer chains in resin break down under UV radiation, weakening the material's structural integrity. Additionally, heat from prolonged exposure can accelerate chemical reactions, further degrading the resin. To mitigate these effects, artists often use UV-resistant coatings or additives, or opt for resins specifically formulated for outdoor use. Proper maintenance, such as periodic sealing and shading, can also extend the lifespan of resin sculptures exposed to sunlight. Understanding these effects helps artists and collectors preserve the aesthetic and structural quality of resin-based outdoor art.