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Polyvinyl alcohol (PVOH, PVA, or PVAl) is a water-soluble synthetic polymer. It has the idealized formula [CH 2 CH(OH)] n . It is used in papermaking , textile warp sizing , as a thickener and emulsion stabilizer in polyvinyl acetate (PVAc) adhesive formulations, in a variety of coatings, and 3D printing .
Boiling point: 112 °C (234 °F; 385 K) Hazards ... PVA is a vinyl polymer. Polyvinyl acetate is prepared by the polymerization of vinyl acetate monomer ...
Melting point: −93.5 °C (−136.3 °F; 179.7 K) ... polymerization offers a convenient method of controlling the synthesis of PVA by the addition of a xanthate or ...
Because of the instability of vinyl alcohol, the thermoplastic polyvinyl alcohol (PVA or PVOH) is made indirectly by polymerization of vinyl acetate followed by hydrolysis of the ester bonds (Ac = acetyl; HOAc = acetic acid): [8] n CH 2 =CHOAc → (CH 2 −CHOAc) n (CH 2 −CHOAc) n + n H 2 O → (CH 2 −CHOH) n + n HOAc
Melting point: 90 °C (194 °F) Hazards Safety data sheet (SDS) MSDS: Except where otherwise noted, data are given for materials in their standard state (at 25 °C ...
I think the inclusion of a boiling point and melting point is probably a bad idea without further explanation.JSR 13:09, 21 September 2012 (UTC). Melting point of PVA varies a lot depending on the level of Hydrolysis. The value of 228 C will refer to a fully-hydrolysed PVA (near 100% pure PolyVinyl Alcohol).
Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) K f (°C⋅kg/mol) Data source; Aniline: 184.3 3.69 –5.96 –5.87 K b & K f [1] Lauric acid: 298.9 44 –3.9
The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the literature, the most recent reference [Handbook on the chemistry and physics of rare earths, vol.12 (1989)] is given with 1529 °C.
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