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Polyketones are a family of high-performance thermoplastic polymers. The polar ketone groups in the polymer backbone of these materials gives rise to a strong attraction between polymer chains, which increases the material's melting point (255 °C for copolymer (carbon monoxide ethylene), 220 °C for terpolymer (carbon monoxide, ethylene, propylene). Trade names include Carilon, "Karilon", Akrotek, and Schulaketon. Such materials also tend to resist solvents and have good mechanical properties. Unlike many other engineering plastics, aliphatic polyketones such as Shell Chemicals' Carilon are relatively easy to synthesize and can be derived from inexpensive monomers. Carilon is made with a palladium(II) catalyst from ethylene and carbon monoxide. A small fraction of the ethylene is generally replaced with propylene to reduce the melting point somewhat. Shell Chemical commercially launched Carilon thermoplastic polymer in the U.S.in 1996,〔(Shell Chemical Company announces The U.S. commercial launch of CARILON Polymers )〕 but discontinued it in 2000.〔(MatWeb-Shell Carilon® DP P1000 Polyketone (discontinued * *) )〕 SRI International offers Carilon thermoplastic polymers.〔(Carilon Thermoplastic Polymer - Next-Generation Plastics from SRI International )〕 Hyosung announced that they would launch production in 2015 For a discussion of the silicon containing polymers originally thought to have analogous structures, see silicone polymers. ==Industrial production== The ethylene-carbon monoxide co-polymer is most significant. Industrially, this polymer is synthesized either as a methanol slurry, or ''via'' a gas phase reaction with immobilized catalysts. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Polyketone」の詳細全文を読む スポンサード リンク
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