How does prolonged sun exposure affect the tensile strength of polyethylene sculptures?

Prolonged sun exposure significantly impacts the tensile strength of polyethylene sculptures due to UV radiation. Over time, UV rays break down the polymer chains in polyethylene, leading to molecular degradation. This process weakens the material, reducing its elasticity and resistance to stress.

Studies show that polyethylene sculptures exposed to sunlight for extended periods become brittle and prone to cracking. The rate of degradation depends on factors like pigment additives, UV stabilizers, and climate conditions. Darker colors absorb more UV radiation, accelerating damage.

To mitigate these effects, artists and conservators use UV-resistant coatings or incorporate stabilizers during manufacturing. Regular maintenance, such as applying protective sealants, can also extend the lifespan of outdoor polyethylene art. Understanding these factors helps preserve sculptures while maintaining their structural integrity.