What are the chemical resistance differences between PVC and polyethylene outdoor flower boxes?

When selecting outdoor flower boxes, understanding the chemical resistance of materials like PVC and polyethylene is crucial for longevity and performance. PVC (polyvinyl chloride) offers excellent resistance to acids, alkalis, and many industrial chemicals, making it suitable for harsh environments. However, it can degrade when exposed to certain solvents like acetone or ketones.

Polyethylene, on the other hand, is highly resistant to a wide range of chemicals, including most acids, bases, and alcohols, but may soften or swell when in contact with hydrocarbons or oxidizing agents. For outdoor use, polyethylene's flexibility and UV resistance often make it a better choice for fluctuating weather conditions, while PVC's rigidity suits structured designs.

Ultimately, the choice depends on the specific chemicals your flower boxes may encounter and the environmental conditions they’ll face. Both materials have unique advantages, so evaluate your needs carefully.