Poly Vinyl Alcohol(POVAL), PVA

1.  Name: Poly vinyl Alcohol(POVAL), PVA

2.  Molecular formula: [C2H4O]n

3.  Molecular weight: 44.05

4.  Physical Property: Density: relative density of polyvinyl alcohol (25 ℃ / 4 ℃) 1.27 ~ 1.31 (solid), 1.02 (10% solution.

   Heating performance: it will be discolored slowly heated to above 100 ℃in the air, embrittlement. Heated to 160 ~ 170 ℃ etherification dehydration, loss of solubility, heated to 200 ℃ begin to decompose. More than 250 ℃ into the polymer containing conjugated double bonds.

5.  Chemical properties: Soluble in water, heated to completely dissolve the general need to 65 ~ 75 ℃. Not dissolve in gasoline, kerosene, vegetable oil, benzene, toluene, dichloroethane, carbon tetrachloride, acetone, ethyl acetate, methanol, ethylene glycol, etc., slightly soluble in DMSO. 120 ~ l50 ℃ soluble glycerol, however, a jelly when cold to room temperature.

6.  Specification: power 1799, 2099, 2488, 1788, 0588

7.  Appearance: White powder

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