Poly(vinyl alcohol), MW 25,000, 98% hydrolyzed, also known as PVA or PVOH, is a water-soluble synthetic polymer used in films, coatings, adhesives, binders, textile sizing, paper processing, emulsion stabilization, and specialty formulation work.
Synonyms / related names: PVA; PVOH; polyvinyl alcohol; poly(vinyl alcohol).
This grade has an approximate molecular weight of 25,000 and is 98% hydrolyzed. The degree of hydrolysis influences solubility, crystallinity, hydrogen bonding, film strength, and dissolution behavior in aqueous systems.
Researchers, formulators, and industrial users may use poly(vinyl alcohol) in water-soluble films, coating systems, adhesive and binder formulations, textile and paper treatments, emulsion polymerization, dispersions, and hydrogel-related materials research.
Key Properties
- Water-soluble poly(vinyl alcohol)
- CAS Number: 9002-89-5
- Product Number: 04397
- Synonyms: PVA, PVOH, polyvinyl alcohol
- Molecular Weight: ~25,000
- Grade: 98% hydrolyzed
- Intrinsic Viscosity: 4% AQ cps = 5.5-6.0%
- Viscosity: 4% AQ cps = 5.5-6.0%
- Glass Transition Temperature (Tg): ~85°C
- Soluble in water, glycerol, and glycols
- Melting Point: >220°C
- Density: 1.29
Applications
Films & Coatings
Poly(vinyl alcohol) may be used in water-soluble films and coating systems where film formation, hydrogen bonding, and controlled water interaction are important formulation considerations.
Adhesives & Binders
PVA is commonly used in adhesive and binder formulations for paper, textile, wood, and specialty material systems where water solubility and polymer film strength are required.
Textile & Paper Processing
This polymer may be used as a sizing agent or surface treatment polymer in textile and paper processing workflows where fiber interaction, surface strength, and coating uniformity are evaluated.
Emulsion Polymerization & Stabilization
Poly(vinyl alcohol) may function as a protective colloid in emulsion polymerization and dispersion systems where polymeric stabilization is needed.
Hydrogel & Materials Research
PVA may be used in hydrogel-related and specialty materials research where water solubility, hydroxyl functionality, and film-forming behavior are relevant to the application.
Solubility & Processing Considerations
- Soluble in water, glycerol, and glycols
- 98% hydrolyzed PVA generally requires more dissolution energy than lower-hydrolysis grades
- Dissolution depends on water temperature, mixing intensity, particle wetting, concentration, and batch size
- Hydrogen bonding and crystallinity influence solubility, film strength, and water interaction
- Compatibility should be evaluated with plasticizers, salts, surfactants, pigments, fillers, and other formulation components
Final performance should be confirmed under the user’s specific formulation and processing conditions, including dissolution method, solids level, temperature profile, drying conditions, and intended end use.
Preparation Tips
- Add gradually to water with adequate agitation to reduce clumping
- Use controlled heating and mixing when preparing aqueous solutions
- Allow sufficient time for complete hydration and dissolution
- Avoid rapid dumping of powder into water, which can form difficult-to-dissolve agglomerates
- Run small-scale dissolution and compatibility trials before production or process transfer
Handling & Storage
- Store at room temperature
- Use gloves and a fume hood
- Keep container tightly closed when not in use
- Use good ventilation and standard laboratory or industrial safety practices
- Avoid unnecessary dust generation during powder handling
- Refer to the Safety Data Sheet before handling
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FAQ
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1. What is Poly(vinyl alcohol), MW 25,000, 98% hydrolyzed used for?
Poly(vinyl alcohol), MW 25,000, 98% hydrolyzed is used in films, coatings, adhesives, binders, textile sizing, paper processing, emulsion stabilization, dispersions, and hydrogel-related materials research.
2. What is the molecular weight of this PVA product?
The listed molecular weight is approximately 25,000.
3. What does 98% hydrolyzed mean?
98% hydrolyzed refers to the degree of hydrolysis, meaning most acetate groups from the parent poly(vinyl acetate) have been converted to hydroxyl groups in the poly(vinyl alcohol) structure.
4. What solvents dissolve Poly(vinyl alcohol), MW 25,000, 98% hydrolyzed?
The product page lists solubility in water, glycerol, and glycols.
5. How should Poly(vinyl alcohol), MW 25,000, 98% hydrolyzed be stored?
Store Poly(vinyl alcohol), MW 25,000, 98% hydrolyzed at room temperature. Review the Safety Data Sheet for complete storage, handling, and personal protective equipment guidance.
Safety & Documentation
Poly(vinyl alcohol), MW 25,000, 98% hydrolyzed should be handled with gloves, a fume hood, and standard laboratory or industrial safety practices. The product page lists the product as an irritant. Refer to the Safety Data Sheet (SDS) and product specification for complete handling, storage, hazard, and technical information.
