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2,3,3,3-Tetrafluoropropene, HFO-1234yf, is a hydrofluoroolefin (HFO) with molecular formula CH 2 =CFCF 3. Its primary application is as a refrigerant with low global warming potential (GWP). [1] [2] As a refrigerant, it is designated R-1234yf [1] and marketed under the names Opteon YF by Chemours and as Solstice YF by Honeywell. [3]
Tetrafluoropropene. This is a gaseous phase effluent from the decomposition of Teflon when laser cutting it. [1]
1,3,3,3-Tetrafluoropropene. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). 1,3,3,3-Tetrafluoropropene is a hydrofluoroolefin which has two isomers: cis -1,3,3,3-tetrafluoropropene. trans -1,3,3,3-tetrafluoropropene, used as a refrigerant (R-1234ze (E).)
trans-1,3,3,3-Tetrafluoropropene (HFO-1234ze (E), R-1234ze (E)) is a hydrofluoroolefin. It was developed as a "fourth generation" refrigerant to replace fluids such as R-134a, as a blowing agent for foam and aerosol applications, and in air horns and gas dusters. [3] The use of R-134a is being phased out because of its high global warming ...
Hydrofluoroolefin. Chemical structure of 1,3,3,3-tetrafluoropropene (HFO-1234ze) Hydrofluoroolefins (HFOs) are unsaturated organic compounds composed of hydrogen, fluorine and carbon. These organofluorine compounds are of interest as refrigerants. Unlike traditional hydrofluorocarbons (HFCs) and chlorofluorocarbons (CFCs), which are saturated ...
Three-two pull down. Three-two pull down ( 3:2 pull down) is a term used in filmmaking and television production for the post-production process of transferring film to video . It converts 24 frames per second into 29.97 frames per second, converting approximately every four frames into five frames plus a slight slow down in speed.
Kingston Technology was founded on October 17, 1987, in response to a severe shortage of 1Mbit surface-mount memory chips, [5] Chinese immigrant John Tu designed a new single in-line memory module (SIMM) that used readily available, older-technology through-hole components. In 1990 the company branched out into its first non-memory product line ...
Tetrafluoroethylene ( TFE) is a fluorocarbon with the chemical formula C 2 F 4. It is the simplest perfluorinated alkene. This gaseous species is used primarily in the industrial preparation of fluoropolymers . It was first reported as "dicarbon tetrafluoride" in 1890. [2]