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PTFE Resin Powder: Tetrafluoroethylene Polymerised under Pressure, Plunkett 1941
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Charlie

20. Oktoba 2026DE
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PTFE Resin Powder: Tetrafluoroethylene Polymerised under Pressure, Plunkett 1941

PTFE (polytetrafluoroethylene) is the chemically inert plastic. Roy Plunkett found that tetrafluoroethylene, kept under pressure at room temperature, slowly turns into a white solid (US 2,230,654, 1941). A little silver nitrate speeds it up: 7 parts of the gas with 0.1 part silver nitrate at 25 °C for 21 days gave 2.3 parts of polymer. The powder dissolves in nothing usual, does not burn on its own, and melts only at red heat. The picture: our diagram.
Juu
3 weeks

Maagizo

1

Charge the cylinder

Put 0.1 part of silver nitrate in a steel pressure cylinder, close it and condense in 7 parts of tetrafluoroethylene, so it stands under its own pressure.

Vifaa kwa hatua hii:

TetrafluoroethiliniTetrafluoroethilini7 parts

Zana zinazohitajika:

Nitrati ya FedhaNitrati ya Fedha
Mtungi wa gesi yenye shinikizoMtungi wa gesi yenye shinikizo
Mtego baridiMtego baridi
Mizani ya mizani-mbiliMizani ya mizani-mbili
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali
Glavu za mpiraGlavu za mpira
2

Leave at 25 °C for 21 days

Keep the cylinder at 25 °C for 21 days. Warmer is faster. Without the silver nitrate, 10 days gave only about 7 %.

Zana zinazohitajika:

Mtungi wa gesi yenye shinikizoMtungi wa gesi yenye shinikizo
3

Remove the gas, take out the powder

Let out the unpolymerised tetrafluoroethylene (ours: into a cold trap to use again) and take out the solid polymer: about 2.3 parts, a third of the gas.

Zana zinazohitajika:

Mtego baridiMtego baridi
Kabati la kutoa mvuke (lenye bomba)Kabati la kutoa mvuke (lenye bomba)
Glavu za mpiraGlavu za mpira

Vifaa

1

Zana Zinazohitajika

7

Mchoro huu unatengeneza

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Kishikilia nafasi

Unga wa resini ya PTFE

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Tetrafluoroethylene: Chlorodifluoromethane Pyrolysed in a Silver Tube at 700 °C
Hatari

Tetrafluoroethylene: Chlorodifluoromethane Pyrolysed in a Silver Tube at 700 °C

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