单词	tetrafluoroethylene
释义	tetrafluoroethylene /ˌtɛtrəˌflʊərəʊˈɛθɪliːn / /ˌtɛtrəˌfloːrəʊˈɛθɪliːn/ noun [mass noun] Chemistry A dense colourless gas which is polymerized to make plastics such as polytetrafluoroethylene. Chemical formula: F2CCF2. The architects considered many options for the roof materials and finally chose an ultra-violet-stable fluoropolymer, ethylene tetrafluoroethylene, welded into cushions.... The report states the listing is based on findings from laboratory animal studies of tetrafluoroethylene in which cancer was observed in multiple organs of multiple species following long-term inhalation exposures. The pyrolysis of tetrafluoroethylene was studied in the temperature and pressure range 300 to 455C and 25 to 760 torr.
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