Polyvinyl alcohol, organic, white sheet, flocculent or powdery solid, odorless. Was dissolved in water (95 above), insoluble in gasoline, kerosene, vegetable oil, benzene, toluene, dichloroethane, carbon tetrachloride, acetone, ethyl acetate, methanol, ethylene glycol and the like. Slightly soluble in DMSO. Polyvinyl alcohol is an important chemical raw materials for the manufacture of polyvinyl acetal, resistance to gasoline pipelines and vinylon synthetic fibers, fabric treatment agents, emulsifiers, paper coatings, adhesives, glues and so on.
- 1. Molecular Formula: (C2H4O)n. Alcoholysis degree: 88%; Polymerization degree: 2400; Molecular weight: 105600. Solubility: the solubility of PVA varies depending on its alcoholysis degree and polymerization degree.
- 2. Polyvinyl alcohol is a water-soluble polymer derived from the hydrolysis of polyvinyl acetate, without the need for monomer polymerization. It appears as a white powder.
- 3. Thermal Stability: PVA softens when heated and shows no significant change below 40°C. Prolonged heating above 160°C causes gradual discoloration. At temperatures above 220°C, it decomposes to water, acetic acid, acetaldehyde, and butene.
- 4. PVA is almost unaffected by weak acids, weak alkalis, or organic solvents, and it exhibits high oil resistance. PVA is a low-viscosity polymer, and its aqueous solution is very stable at room temperature, with no degradation during storage.
- 5. Film-Forming Properties: Due to strong intermolecular adhesion, PVA easily forms films that are colorless, transparent, and exhibit excellent mechanical strength. The film surface is smooth, non-sticky, and has good solubility. PVA films have high light transmittance, high moisture permeability, and excellent printability.
- 1. Molecular Formula: (C2H4O)n. Alcoholysis degree: 88%; Polymerization degree: 2400; Molecular weight: 105600. Solubility: the solubility of PVA varies depending on its alcoholysis degree and polymerization degree.
- 2. Polyvinyl alcohol is a water-soluble polymer derived from the hydrolysis of polyvinyl acetate, without the need for monomer polymerization. It appears as a white powder.
- 3. Thermal Stability: PVA softens when heated and shows no significant change below 40°C. Prolonged heating above 160°C causes gradual discoloration. At temperatures above 220°C, it decomposes to water, acetic acid, acetaldehyde, and butene.
- 4. PVA is almost unaffected by weak acids, weak alkalis, or organic solvents, and it exhibits high oil resistance. PVA is a low-viscosity polymer, and its aqueous solution is very stable at room temperature, with no degradation during storage.
- 5. Film-Forming Properties: Due to strong intermolecular adhesion, PVA easily forms films that are colorless, transparent, and exhibit excellent mechanical strength. The film surface is smooth, non-sticky, and has good solubility. PVA films have high light transmittance, high moisture permeability, and excellent printability.
