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In 1938, polytetrafluoroethylene (DuPont brand name Teflon) was discovered by accident by a recently hired DuPont Ph.D., Roy J. Plunkett. While working with tetrafluoroethylene gas to develop refrigerants, he noticed that a previously pressurized cylinder had no pressure remaining. In dissecting the cylinder, he found a mass of white solid in a ...
The commonly known brand name of PTFE-based composition is Teflon by Chemours, [4] a spin-off from DuPont, which originally invented the compound in 1938. [4] Polytetrafluoroethylene is a fluorocarbon solid , as it is a high- molecular-weight polymer consisting wholly of carbon and fluorine .
A convenient, safe method for generating TFE is the pyrolysis of the sodium salt of pentafluoropropionic acid: [6]. C 2 F 5 CO 2 Na → C 2 F 4 + CO 2 + NaF. The depolymerization reaction – vacuum pyrolysis of PTFE at 650–700 °C (1,200–1,290 °F) in a quartz vessel – is a traditional laboratory synthesis of TFE.
Teflon flu, aka polymer fume fever, is a term used to describe people who have gotten sick after being exposed to fumes from Teflon pans, according to the National Capital Poison Center.
Kennedy High School on WMAQ-TV's It's Academic in 1967 Student quiz shows have appeared on television as both local and national programs since the second half of the 20th century. The following is a list of quiz programs that have aired on local or national television, featuring teams from schools, colleges, or universities in academic ...
Polymer fume fever, also known as “Teflon Flu,” is used to describe the flu-like symptoms a person can get after being exposed to fumes typically from polytetrafluoroethylene (PTFE).
Editor's Note: This page is a summary of news on the Georgia school shooting for Wednesday, Sept. 4. For the latest news, view our story for Thursday, Sept. 5. Four people were fatally shot and ...
It was designed to have high corrosion resistance and strength over a wide temperature range. ETFE is a polymer and its source-based name is poly (ethene-co-tetrafluoroethene) . It is also known under the DuPont brand name Tefzel and is sometimes referred to as 'Teflon Film'.