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Polyvinyl Alcohol: Polyvinyl Acetate Stirred in Alcoholic Potash
Charlie

Imeundwa na

Charlie

17. Oktoba 2026DE
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Polyvinyl Alcohol: Polyvinyl Acetate Stirred in Alcoholic Potash

Vinyl alcohol itself cannot be isolated, but its polymer can: Herrmann and Haehnel (patent 1928) stirred ground polyvinyl acetate into potash dissolved in alcohol, and polyvinyl alcohol fell out as a white, odourless powder that dissolves in water. It is the protective colloid in PVA (polyvinyl acetate) glue emulsions. The picture: our diagram of the patent's Example I.
Kati
An hour, then drying

Maagizo

1

Grind the polyvinyl acetate

Grind the solid polyvinyl acetate to a powder in a mortar (our method).

Vifaa kwa hatua hii:

Polivinili asetatiPolivinili asetati80 g

Zana zinazohitajika:

Kinu na mchiKinu na mchi
Mizani ya dijitali ya jikoniMizani ya dijitali ya jikoni
2

Dissolve the potash

Dissolve 60 g potassium hydroxide in 50 g ethyl alcohol in a vessel you can stir. Potash burns skin and eyes.

Vifaa kwa hatua hii:

Hidroksidi ya potasiamuHidroksidi ya potasiamu60 g
Etanoli ya maabara, 95 %Etanoli ya maabara, 95 %50 g

Zana zinazohitajika:

Bikari ya kiooBikari ya kioo
Fimbo ya Kioo ya KukorogaFimbo ya Kioo ya Kukoroga
Mizani ya dijitali ya jikoniMizani ya dijitali ya jikoni
Glavu zinazostahimili kemikaliGlavu zinazostahimili kemikali
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali
3

Stir in the acetate

Add the 80 g ground polyvinyl acetate while stirring hard, and keep stirring for about half an hour. Polyvinyl alcohol precipitates.

Zana zinazohitajika:

Bikari ya kiooBikari ya kioo
Fimbo ya Kioo ya KukorogaFimbo ya Kioo ya Kukoroga
Glavu zinazostahimili kemikaliGlavu zinazostahimili kemikali
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali
4

Filter and dry

Collect the precipitate on a filter and dry it: a white powder without odour that dissolves in water.

Zana zinazohitajika:

Kifaneli cha Büchner (kauri)Kifaneli cha Büchner (kauri)
Karatasi ya KuchujaKaratasi ya Kuchuja
Trei wazi ya kukaushiaTrei wazi ya kukaushia
Glavu zinazostahimili kemikaliGlavu zinazostahimili kemikali
5

Scaling the patent's example

Inapakia daftari la Jupyter…

Vifaa

3

Zana Zinazohitajika

9

Mchoro huu unatengeneza

Thumbnail
Kishikilia nafasi

Unga wa polivinili alkoholi

Free

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Polyvinyl Acetate: Vinyl Acetate Set Solid by Sunlight

Polyvinyl Acetate: Vinyl Acetate Set Solid by Sunlight

na CharlieDE

Polima

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