What are the thermal expansion coefficients of resin versus WPC in sculptures?

When selecting materials for sculptures, especially those intended for outdoor display, understanding thermal expansion coefficients is crucial. Resin and Wood-Plastic Composite (WPC) are two popular choices, but they behave differently under temperature changes.

Resin, a synthetic polymer, typically has a higher thermal expansion coefficient (around 50-100 x 10^-6/°C), meaning it expands and contracts more with temperature fluctuations. This can lead to cracking or warping in extreme conditions. WPC, a blend of wood fibers and plastic, has a lower coefficient (20-40 x 10^-6/°C), offering better dimensional stability in varying climates.

For outdoor sculptures, WPC's lower thermal expansion makes it more durable over time, while resin may require additional structural support or coatings to mitigate expansion effects. Artists and designers should weigh these properties when choosing materials for long-lasting art installations.