How does the resistance to oil-based pesticides vary between PVC and polyethylene?

The resistance of plastics like PVC (polyvinyl chloride) and polyethylene to oil-based pesticides varies significantly due to their distinct chemical structures. PVC is known for its high chemical resistance, including against many oil-based pesticides, thanks to its tightly bonded chlorine atoms that repel organic solvents. Polyethylene, particularly high-density polyethylene (HDPE), also offers good resistance but may swell or degrade over prolonged exposure to certain oil-based formulations. Low-density polyethylene (LDPE) is less resistant and more prone to permeation. Factors like pesticide concentration, exposure duration, and environmental conditions further influence performance. For agricultural or industrial applications, choosing the right plastic depends on balancing cost, durability, and chemical compatibility. Testing under real-world conditions is recommended to ensure long-term suitability.