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PVA characters:
1. Name: Poly vinyl Alcohol(POVAL), PVA, poly vinyl acetate
2. Molecular formula: [C2H4O]n
3. Molecular weight: *4.*5
4. Physical Property: Density: Relative density of polyvinyl alcohol (*5 ° C / 4 ° C) 1.*7 ~ 1.*1 (solid), 1.*2 (*0% solution.
Heating performance: It will be discolored slowly heated to above **0 ° Cin the air, embrittlement. Heated to **0 ~ **0 ° C etherification dehydration, loss of solubility, heated to **0 ° C begin to decompose. More than **0 ° C into the polymer containing conjugated double bonds.
5. Chemical properties: Soluble in water, heated to completely dissolve the general need to *5 ~ *5 ° C. Not dissolve in gasoline, kerosene, vegetable oil, benzene, toluene, carbon tetrachloride, acetone, ethyl acetate, methanol, ethylene glycol, etc., slightly soluble in DMSO. **0 ~ l*0 ° C soluble glycerol, however, a jelly when cold to room temperature.
6. Specification: Power ***9, ***9, ***8, ***8, ***8
7. Appearance: White powder
Polyvinyl Alcohol, PVA polyvinyl alcohol
Grades: ***9, ***9, ***9, ***9
Hydrolysis: *9% min
Viscosity: ****0cps