Alexei Volkov
On April 6, 1938, Dr. Roy J. Plunkett, an American chemist working with gases related to refrigerants, accidentally discovered polytetrafluoroethylene (PTFE), commonly known as Teflon. While working at the DuPont Company's plant in New Jersey, Plunkett and his team encountered a frozen, compressed sample of tetrafluoroethylene that had spontaneously polymerized into a white, waxy solid with unique properties. Recognizing the significance of this discovery, Plunkett characterized the material, finding it to be heat-resistant, chemically inert, and with low surface friction. This revolutionary plastic, Teflon, has since found applications in various industries, from aerospace to cookware, and has become a familiar brand recognized worldwide for its superior non-stick properties.
| Characteristics | Values |
|---|---|
| Name | Roy J. Plunkett |
| Born | 26 June 1910 |
| Birthplace | New Carlisle, Ohio |
| Education | Newton High School, Manchester University (BA in Chemistry), Ohio State University (PhD in Chemistry) |
| Occupation | Chemist |
| Discovery | Polytetrafluoroethylene (PTFE), commonly known as Teflon |
| Year of Discovery | 1938 |
| Discovery Location | DuPont Company's Jackson Laboratory, New Jersey |
| Nature of Discovery | Accidental |
| Applications of Discovery | Non-stick coating for pans and cookware, used in the creation of the first atomic bomb, production of tetraethyllead, and in various industries such as aerospace, communications, electronics, industrial processes, and architecture |
| Awards and Honours | Inducted into the Plastics Hall of Fame in 1973, John Scott Medal (1951/1952/1954), National Inventors' Hall of Fame (1985) |
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What You'll Learn
Dr. Roy J. Plunkett discovered Teflon
On April 6, 1938, Dr. Roy J. Plunkett, an American chemist working at DuPont's Jackson Laboratory in Deepwater, New Jersey, discovered Teflon. Plunkett and his team were working with gases related to refrigerants, specifically attempting to make a new chlorofluorocarbon refrigerant. When a cylinder of tetrafluoroethylene gas (TFE) seemed to malfunction, Plunkett decided to investigate further instead of discarding it. Upon opening the cylinder, he discovered that the gas had spontaneously polymerized into a white, waxy solid – polytetrafluoroethylene (PTFE), better known by the brand name Teflon.
PTFE is chemically inert and has the lowest coefficient of friction of any known solid, making it extremely slippery. These unique properties led to its widespread use across multiple industries, including aerospace, communications, electronics, industrial processes, and architecture. It revolutionised non-stick cookware, with the first Teflon-coated pans being sold in the 1950s and becoming available to the general public in the 1960s.
The discovery of Teflon was accidental, and Plunkett himself described it as "an example of serendipity, a lucky accident, or a flash of genius". Despite initial concerns about the high cost of production, Teflon has become a familiar brand recognised worldwide for its superior non-stick properties.
Dr. Roy J. Plunkett received recognition for his discovery of Teflon throughout his career. In 1951, he was awarded the John Scott Medal by the city of Philadelphia for improving the "comfort, welfare, and happiness of humankind". In 1973, he was inducted into the Plastics Hall of Fame, and in 1985, he was honoured in the National Inventors' Hall of Fame, joining distinguished scientists and innovators.
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It was an accident
On April 6, 1938, Dr. Roy J. Plunkett and his team of DuPont chemists made an accidental discovery that would revolutionize the plastics industry. They were working with gases related to refrigerants, specifically attempting to make a new chlorofluorocarbon refrigerant called tetrafluoroethylene. However, they encountered an issue when the gas in its pressure bottle stopped flowing even though the bottle's weight hadn't reached the point signaling "empty."
Upon investigating, they discovered that the tetrafluoroethylene in the container had spontaneously polymerized into a white, waxy solid. This substance was later identified as polytetrafluoroethylene (PTFE), commonly known by its brand name, Teflon. PTFE possessed remarkable properties, including resistance to corrosion, high heat resistance, and low surface friction, making it the most slippery material in existence.
The discovery of Teflon was indeed a fortunate accident. Plunkett's decision to conduct tests on the seemingly defective cylinder led to the characterization of this unique material. Its inertness to virtually all chemicals and extremely low coefficient of friction make it a versatile technology with countless applications.
Teflon has found its way into various industries, including aerospace, communications, electronics, and industrial processes, and even our kitchens. Its non-stick properties have made it a household name, with Teflon-coated cookware becoming a common item for cooks and homeowners worldwide. The recognition of Plunkett's contribution to science and innovation has been commemorated through various awards and his induction into prestigious halls of fame.
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It was first used in the Manhattan Project
Chemists working for DuPont accidentally discovered polytetrafluoroethylene (PTFE), the chemical name for Teflon, in 1938. The discovery is attributed to Dr. Roy J. Plunkett, who was working with gases related to refrigerants. The first Teflon products were sold commercially starting in 1946, and the trademark was registered in 1945.
PTFE is chemically inert and has a very low coefficient of friction, making it the slipperiest material in existence. It has been used in a wide range of applications, including non-stick cookware, carbon fibre composites, plumbing, laboratory equipment, and bullet coatings.
PTFE was first used in the Manhattan Project, which produced the first atomic bomb. During the project, PTFE was used for valves and gaskets that would resist chemical attack by the highly reactive uranium hexafluoride. Uranium hexafluoride is a compound used to separate the isotopes Uranium-235 and Uranium-238 by gaseous diffusion. Uranium-235 is a rare, highly unstable form of uranium that can easily be broken apart.
The Manhattan Project was the largest secret industrial project during World War II. It was initiated in 1939 to counter the potential threat of a German atomic bomb. The first controlled nuclear chain reaction took place in December 1942, and the bomb was ultimately used against Japan. PTFE played a role in changing the course of history by helping to create the first atomic bomb.
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It has many applications
Polytetrafluoroethylene (PTFE), commonly known as Teflon, was accidentally discovered in 1938 by American chemist Roy J. Plunkett. It has since found applications in a wide range of industries due to its unique properties, including its chemical inertness, hydrophobicity, low coefficient of friction, high heat resistance, and flexibility.
One of the most well-known applications of Teflon is in non-stick cookware. PTFE-coated pans were first introduced in 1954 by French engineer Marc Grégoire, who was inspired by his wife Colette Grégoire to use the material on her cooking pans. The non-stick properties of Teflon make it ideal for this application, and it has since become a common household product.
Teflon is also widely used in the aerospace industry. PTFE film is used as a barrier during the production of carbon fiber and fiberglass composites, preventing the sticky materials from adhering to the parts being built. It is also used in the aerospace industry to reduce friction and wear in moving parts, such as bearings and seals.
In the medical field, Teflon provides a medical-grade coating on devices and tools, reducing friction and incorporating antimicrobials to meet sterility requirements. It is also used in laboratory environments for its high corrosion resistance, lining containers, coating magnetic stirrers, and tubing for highly corrosive chemicals.
Teflon is further utilised in the automotive industry, where its durability and resistance to heat and chemicals make it ideal for various components. It is used in electrical applications, such as wires, cables, and insulators, due to its high dielectric strength and ability to withstand high voltages without losing its insulating properties. Additionally, its weatherability makes it suitable for protecting exterior components from environmental conditions.
Teflon has truly revolutionised various industries with its diverse applications, showcasing its versatility and impact on modern technology.
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It's one of the most valuable inventions
In 1938, Dr. Roy J. Plunkett, an American chemist working for DuPont, discovered polytetrafluoroethylene (PTFE), which is commonly known by its brand name, Teflon. The discovery was accidental. Plunkett and his team were attempting to make a new chlorofluorocarbon refrigerant, tetrafluoroethylene, when they noticed that the gas in its pressure bottle had stopped flowing even though the bottle's weight had not dropped to the point signalling "empty". Upon further investigation, they found that the bottle's interior was coated with a waxy, white, and oddly slippery material. This material was PTFE, which would later be trademarked as Teflon in 1945.
Teflon is considered one of the most valuable inventions due to its versatility and wide range of applications. It is chemically inert and has extremely low surface friction, meaning that most substances will not stick to it or react with it. This property has made it invaluable in the kitchen, with Teflon-coated cookware and bakeware becoming extremely popular due to its non-stick properties.
However, the applications of Teflon extend far beyond the kitchen. It is widely used in various industries, including aerospace, communications, electronics, industrial processes, and architecture. In aerospace, for example, PTFE film is used in the production of carbon fibre composites and fibreglass composites. It serves as a barrier between the carbon or fibreglass part being built and the surrounding materials, preventing them from sticking together.
Teflon is also used in laboratory settings due to its high corrosion resistance. It is used for lining containers, coating magnetic stirrers, and as tubing for highly corrosive chemicals such as hydrofluoric acid and fluoroantimonic acid. Additionally, PTFE membrane filters are among the most efficient industrial air filters and are often used in dust collection systems for air stream applications involving high temperatures.
The military has also found a use for Teflon, coating bullets with PTFE to reduce wear on the rifling of firearms. Furthermore, with annual worldwide Teflon sales currently at about $3 billion and projected to grow to over $4 billion by 2027, it is clear that Teflon is not only one of the most valuable inventions but also one of the most commercially successful.
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Frequently asked questions
Teflon, or PTFE, was discovered by American chemist Roy J. Plunkett in 1938.
Plunkett was working with gases related to refrigerants. He had produced and stored tetrafluoroethylene gas (TFE) in small cylinders at dry-ice temperatures. When he and his assistant prepared to use the gas, they found that none came out of the cylinder, yet the cylinder weighed the same as before. They opened it and found a white powder, which Plunkett tested and found to be heat-resistant, chemically inert, and with very low surface friction.
Due to its unique properties, Teflon has found use in a wide range of applications, from satellite components to cookware. It is known for its non-stick properties and is often used in non-stick pans. It is also used in scientific equipment, to waterproof raincoats, to make grease-proof fast-food wrappers, and even to make piano keys squeak-proof.
