Worst-Case Diffusion Coefficients at 40 °C (from Reference 22 Unless Noted)
| Plastic Material | Diffusion Coefficient at 40 °C, cm2sec–1 |
|---|---|
| Polyamide PA-6 (dry) | 1.0 × 10–14 |
| Polymethylmetacrylate (PMMA) | 1.3 × 10–14 |
| Polyethylene terephthalate (PET, dry) | 7.7 × 10–14 |
| Polyethylene terephthalate (PET, contact with water) | 2.0 × 10–13 |
| Poly(vinyl) chloride (PVC, rigid) | 3.5 × 10–13 |
| Polystyrene (PS) | 6.0 × 10–13 |
| Polyvinylidene chloride (PVDC) | 1.0 × 10–12 |
| Polyamide (60% relative humidity) | 3.6 × 10–12 |
| Ethylene vinyl alcohol (EVOH) | 2.3 × 10–10 |
| Polypropylene (PP) | 5.5 × 10–10 |
| Bromobutyl rubber (from reference 50) | 1.2 × 10–9 |
| PVC (plasticized) | 4.4 × 10–9 |
| High-density polyethylene (HDPE) | 7.0 × 10–9 |
| Linear low-density polyethylene (LLDPE) | 7.0 × 10–9 |
| Ethylene/propylene polymer | 9.5 × 10–9 |
| Low-density polyethylene (LDPE) | 3.3 × 10–8 |
| Ethylene vinyl acetate (EVA) | 4.5 × 10–8 |