How does the Izod impact strength of PVC compare to polypropylene in outdoor seating?

When evaluating materials for outdoor seating, impact resistance is a critical factor, especially in harsh environments. The Izod impact strength test measures a material's ability to absorb energy during sudden impacts. PVC (Polyvinyl Chloride) typically exhibits moderate Izod impact strength, but it can become brittle over time when exposed to UV radiation and temperature fluctuations. On the other hand, polypropylene demonstrates higher Izod impact strength, making it more resilient against cracks and fractures in outdoor applications. While PVC may be cost-effective, polypropylene's superior durability and resistance to environmental stress make it a better choice for long-lasting outdoor seating. Understanding these differences helps in selecting the right material based on durability requirements and environmental conditions.