Chemical Resistance of Polyvinyl Alcohol (PVA) Film
The main components of polyvinyl alcohol film are polyvinyl alcohol, plasticizers, surfactants, etc. It exhibits extremely high stability against most organic solvents.
Application Example: Thanks to these properties, PVA film can be used to package oily chemical products, pesticide solvents, etc., without being corroded.
The chemical instability of PVA is mainly reflected in its resistance to water, strong acids, strong alkalis, and oxidizing agents.
| Chemical/Environment | PVA Film Resistance Performance | Key Mechanism |
| Most Organic Solvents | Excellent, no swelling or dissolution | Polarity mismatch; unable to break intermolecular hydrogen bonds |
| Water | Poor, swells or dissolves | Formation of molecule-water hydrogen bonds; disruption of intermolecular hydrogen bonds |
| Strong Acid / Hot Acid | Poor, degrades and breaks down | Acidic hydrolysis; molecular chain scission |
| Strong Alkali / Hot Alkali | Poor, altered performance | Change in alcoholysis degree; molecular chain rearrangement |
| Oxidizing Agents | Poor, degrades and becomes brittle | Oxidation leads to molecular chain breakage |
| Heat (>100°C) | Poor, yellows, becomes brittle, and decomposes | Dehydration, molecular chain scission, and cross-linking |
| UV Light | Moderate, undergoes photodegradation | UV light causes molecular chain breakage |
| Microorganisms | Stable in solid form; aqueous solution prone to spoilage | Not a nutrient source itself, but aqueous solutions can support microbial growth |
*Chemical Resistance Parameters of Water-Soluble Film
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