How does the resistance to splintering compare between polypropylene and PVC?

When comparing polypropylene and PVC in terms of resistance to splintering, several factors come into play. Polypropylene is known for its flexibility and impact resistance, making it less prone to splintering under stress. Its semi-crystalline structure allows it to absorb energy without fracturing easily. On the other hand, PVC (polyvinyl chloride) is more rigid and brittle, especially at lower temperatures, which increases its likelihood of splintering when subjected to force.

The molecular composition of polypropylene grants it superior toughness, reducing the risk of splintering in applications requiring durability, such as packaging or automotive parts. PVC, while strong and resistant to chemicals, tends to crack or splinter under high impact due to its rigid nature. However, additives like plasticizers can improve PVC's flexibility, mitigating this issue to some extent.

In summary, polypropylene generally outperforms PVC in splinter resistance, making it a better choice for applications where flexibility and impact resistance are critical. PVC may still be suitable for static or low-stress environments where its other properties, such as chemical resistance, are prioritized. Understanding these differences helps in selecting the right material for specific use cases.