What are the differences in thermal expansion coefficients between PVC and polypropylene outdoor ottomans?

When selecting outdoor ottomans, understanding material properties like thermal expansion coefficients is crucial for durability. PVC (polyvinyl chloride) and polypropylene are common plastics used in outdoor furniture, but they behave differently under temperature changes.

PVC has a higher thermal expansion coefficient (approximately 50-80 x 10^-6/°C) compared to polypropylene (around 100-150 x 10^-6/°C). This means polypropylene expands and contracts more with temperature fluctuations, which can affect long-term stability in extreme climates.

For outdoor ottomans, PVC's lower expansion rate may provide better dimensional stability, reducing warping or cracking risks. Polypropylene, while more flexible, might require design adjustments to accommodate expansion. Consider your local climate and usage patterns when choosing between these materials for optimal performance.