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Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene, and has numerous applications because it is chemically inert. [3] 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]
This resulted in the transformation of the solid PTFE into a microporous structure that was about 70% air. The company initially referred to this new material as "fibrillated PTFE". One year later, it was given the name of "Gore-Tex expanded PTFE". [5] Today, expanded PTFE (ePTFE) accounts for the vast majority of the company's products.
The following is an incomplete list of office-supply companies in the United States. 0–9. 3M [1] A–M. A. B. Dick Company; A. T. Cross Company; ACCO Brands;
Quaker Houghton is an American chemical company that was founded in 1918. It is headquartered in Conshohocken, Pennsylvania.With its global presence in 21 countries and 35 locations worldwide, the company has over 50% of net sales outside of the United States. [1]
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.
USGS map showing the number of PFAS detections in tap water samples from select sites across the U.S. In April 2024, the EPA issued a final drinking water rule for PFOA, PFOS, GenX, PFBS, PFNA, and PFHxS. Within three years, public water systems must remove these six PFAS to near-zero levels. States may be awarded grants up to $1 billion in aid ...
The sample of gaseous TFE in the cylinder had polymerized spontaneously into a white, waxy solid. The polymer was polytetrafluoroethylene (PTFE). In 1945, DuPont commercialized PTFE as Teflon. They found that PTFE was resistant to corrosion, had low surface friction, and high heat resistance. [17]
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.