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- W2480656129 abstract "Early Developments (1950-1965) Discoveries in the laboratories of Ziegler and Natta (1-5) in the early 1950s caused a revolution in polymer and organometallic chemistry. The ability to polymerize ethylene at atmospheric pressure and room temperature was a result of extensive studies by Ziegler over many years in the field of reactions of organometallic compounds with olefins (6). Prior to this discovery extremely high pressure (>20,000 lb/in2) and temperatures (approximately 250 °C) were required to convert ethylene to solid polyethylene. Direct polymerization of ethylene by this high pressure route had been achieved in the 1930s. This free-radical process normally produces branched polyethylenes of the low-density type. Ziegler claimed the discovery of a new process for polyethylene, but acknowledged he had not discovered a new product. He recognized its identity with polymethylene made from catalyzed decompositions of diazomethane. Ziegler and Gellert (6) in 1949 showed that aluminum hydride reacts with ethylene at" @default.
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- W2480656129 date "1985-09-25" @default.
- W2480656129 modified "2023-10-08" @default.
- W2480656129 title "Coordinated Anionic Polymerization and Polymerization Mechanisms" @default.
- W2480656129 doi "https://doi.org/10.1021/bk-1985-0285.ch004" @default.
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