How does polypropylene’s resistance to hydrolysis compare to PVC?

Polypropylene (PP) and polyvinyl chloride (PVC) are widely used plastics with distinct properties, especially regarding hydrolysis resistance. Polypropylene exhibits excellent resistance to hydrolysis due to its hydrophobic nature, making it highly durable in wet or humid environments. Its molecular structure lacks polar groups, minimizing water absorption and degradation over time.

In contrast, PVC has moderate hydrolysis resistance but is more susceptible to degradation in prolonged water exposure, especially at elevated temperatures. While PVC performs well in many applications, its chlorine content can lead to gradual breakdown under hydrolytic conditions.

For industries requiring long-term water resistance, polypropylene is often the superior choice. However, PVC remains cost-effective for less demanding environments. Understanding these differences helps in selecting the right material for specific applications.