Description
Specifications Table
Product Name – Polyvinyl alcohol, 87.0 – 89.0% partially hydrolyzed BAKER™
Quantity/Pack Size – 1 kg
Form – Powder
Grade – BAKER™
Application – Film-forming, adhesive, emulsifier
Product Overview
Polyvinyl alcohol (PVA), 87.0-89.0% partially hydrolyzed, is a water-soluble synthetic polymer known for its excellent film-forming properties, high tensile strength, and biocompatibility. This BAKER™ grade PVA is produced through controlled hydrolysis of polyvinyl acetate, resulting in a product with balanced solubility and mechanical properties. The partial hydrolysis (87-89%) ensures moderate water resistance while maintaining solubility in hot water, making it versatile for applications requiring gradual dissolution or controlled release. Its low toxicity and non-ionic nature enhance compatibility with a wide range of additives, resins, and fillers. The powder form allows for easy dispersion in aqueous solutions, forming clear, flexible films upon drying. This grade is particularly valued for its consistency in viscosity and molecular weight distribution, ensuring reproducible results in formulations. As a thermoplastic material, it can be processed via extrusion or molding when plasticized, though its primary use remains in solution-based applications. The material exhibits good oxygen barrier properties when formed into films, contributing to its utility in protective coatings and packaging-related research. Storage stability is excellent under dry conditions, with minimal degradation over time when protected from moisture.
FAQs
1. What is the difference between 87-89% and fully hydrolyzed PVA?
Partially hydrolyzed PVA (87-89%) retains some acetate groups, making it more soluble in cold water and less crystalline than fully hydrolyzed grades, which require hot water for dissolution and offer higher tensile strength.
2. Can this PVA be used for 3D printing applications?
While this grade can serve as a support material in some 3D printing systems, its partial hydrolysis may limit compatibility with high-temperature extrusion processes typically used in FDM printing.
3. How does the BAKER™ grade compare to standard laboratory grades?
BAKER™ grade PVA undergoes stricter quality control for particle size distribution and residual acetate content, resulting in more consistent viscosity and film-forming properties compared to generic lab grades.
4. What solvents can dissolve this PVA besides water?
This partially hydrolyzed PVA is primarily water-soluble, though it may dissolve in highly polar solvents like dimethyl sulfoxide (DMSO) or glycerol when heated, with solubility decreasing as hydrolysis percentage increases.
5. Does this PVA contain any plasticizers or additives?
The BAKER™ grade is supplied as pure polyvinyl alcohol without added plasticizers, though it may contain trace amounts of sodium acetate as a byproduct of the hydrolysis process.
