| Demonstration Experiment on Video Objective: Polymerization Peter Keusch |
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German version
Hazards and safety precautions:
Safety glasses and protective gloves required. Protect from air and water. Do not use water extinguishers on sodium fires! Always wear safety glasses when working with sodium. If cutting solid sodium, remove any protective oil and cut the solid cleanly with a knife. Return all traces of sodium to the storage vessel - any small pieces of sodium left on the bench will react with moisture in the air to form sodium hydroxide which is very corrosive. Experimental procedure: 10 g of e - caprolactam are placed into a 25 mL beaker. Using a glass rod a small piece of sodium (approx. 0.01 g) is pressed into the caprolactam. The melting of the mixture occurs with reduced burner flame. Afterwards the liquefied materials are heated to boiling. The deep brown molten mass is cooled down for 5 minutes. The mixture will become much more viscous. Fibers are drawn by dipping a glass rod into the polymer and rapidly drawing out the solidifying material of the beaker. |
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 Video clip
(Download RealPlayer .rm file) |
