What are the effects of prolonged compression on the shape recovery of PVC?

Prolonged compression significantly impacts the shape recovery of PVC (Polyvinyl Chloride), a widely used plastic material. When subjected to extended pressure, PVC undergoes permanent deformation, reducing its ability to return to its original shape. Factors such as temperature, duration of compression, and the presence of plasticizers play crucial roles in this process.

At higher temperatures, PVC becomes more pliable, making it prone to deformation under compression. Over time, the material's molecular structure may realign, leading to reduced elasticity. Plasticizers, often added to PVC to enhance flexibility, can also influence recovery rates—excessive compression may cause these additives to migrate, further diminishing shape memory.

For applications requiring long-term durability, understanding these effects is essential. Proper design and material selection can mitigate permanent deformation, ensuring PVC retains its functional and aesthetic properties over time.