Polyethylene, one of the most useful of modern plastics, is formed by the polymerisation of ethylene. In the original process, invented in the laboratories of Imperial Chemical Industries Ltd., this was carried out by the use of great pressures, but it has recently been discovered by Dr. Karl Ziegler in Germany and scientists of American companies that ethylene can be polymerised at normal pressures by the use of certain catalysts.
KeywordsChromium Petroleum Polyethylene Propylene Penicillin
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