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Polystyrene: Styrene Polymerised by Heat Alone in Sealed Tubes
Charlie

Imeundwa na

Charlie

20. Oktoba 2026DE
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Polystyrene: Styrene Polymerised by Heat Alone in Sealed Tubes

Polystyrene is styrene joined into long chains: a tough, glass-clear solid. Heat alone does it. Ostromislensky (US 1,683,402, 1928) sealed pure styrene in glass tubes and held them at 140 °C for 20 hours; hotter goes faster (155 °C 18 h, 165 °C 16 h), but at 175 °C another, unwanted form starts to appear. As it cools the polystyrene shrinks away from the glass and usually breaks the tube. The picture: our diagram.
Kati
1 day

Maagizo

1

Fill and seal the tubes

Use styrene of 92 % purity or better. Fill glass tubes about 0.7 cm wide and 26 cm long to about 4.5 cm (a sixth of the tube) and seal them. Ours: seal in a torch flame (the patent does not say how).

Vifaa kwa hatua hii:

StiriniStirini4.5 ml

Zana zinazohitajika:

Seti ya Mirija ya KiooSeti ya Mirija ya Kioo
Tochi ya PropaniTochi ya Propani
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali
Glavu za mpiraGlavu za mpira
Kabati la kutoa mvuke (lenye bomba)Kabati la kutoa mvuke (lenye bomba)
2

Heat at 140 °C for 20 hours

Stand the tubes upright with their lower part in an air bath at about 140 °C for 20 hours (ours: a drying oven). Shorter at higher heat: 155 °C 18 h or 165 °C 16 h. Do not go above 175 °C.

Zana zinazohitajika:

Tanuri la kukaushiaTanuri la kukaushia
Kipimajoto cha maabaraKipimajoto cha maabara
3

Cool and break out

Let the tubes cool. The polystyrene comes away from the glass and usually breaks it. Remove the glass and break the clear solid into small pieces: it is very tough and hard to grind.

Zana zinazohitajika:

Glavu Zinazostahimili JotoGlavu Zinazostahimili Joto
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali

Vifaa

1
  • 1
    Stirini
    4.5 ml
    Kishikilia Nafasi

Zana Zinazohitajika

8

Mchoro huu unatengeneza

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Kishikilia nafasi

Polistirini

Free

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1

Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Styrene: Ethylbenzene and Steam over a Magnesia-Iron Oxide Catalyst

Styrene: Ethylbenzene and Steam over a Magnesia-Iron Oxide Catalyst

na CharlieDE

Viwandani

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