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Nylon

physical science Maturity 11-13 Next article →

Nylon is a versatile family of synthetic polymers. A polymer is a large molecule made of many smaller units joined together.

Nylon fibre SEM
Nylon fibre SEM

These materials are characterized by amide linkages, which are chemical bonds that connect different groups within the molecule. Most nylons have a brownish color and a soft texture. Some varieties even have a silk-like appearance. Because nylons are thermoplastics, they can be melted and processed into many forms. This allows them to be turned into fibers, thin films, or various solid shapes.

Nylon 6 and Nylon 6-6
Nylon 6 and Nylon 6-6

This flexibility makes nylon essential for many modern industries.

Scientists categorize nylons into different families based on how they are built. One group is designated as nylon-XY. These are created by combining diamines and dicarboxylic acids. The X and Y represent the specific lengths of the carbon chains used in the reaction. A famous example of this type is nylon-6,6.

Condensation polymerization diacid diamine
Condensation polymerization diacid diamine

Another family is called nylon-Z. These are derived from aminocarboxylic acids with a carbon chain length of Z, such as nylon-6. To make these fibers strong, a process called cold drawing is used. This method helps align the molecules to create the strength needed for textiles.

Nylon-3D-h bond
Nylon-3D-h bond

The development of nylon began with a new research structure at the DuPont company. In 1927, Charles Stine suggested organizing chemical departments into small, pioneering research teams. These teams were meant to turn pure chemistry into practical applications. DuPont hired Wallace Hume Carothers, a Harvard instructor, to lead the polymer research group. Carothers focused on testing the theories of German chemist Hermann Staudinger. His work greatly improved the scientific understanding of polymers.

Wallace Carothers, in the lab
Wallace Carothers, in the lab

His research eventually led to the creation of both neoprene and the first nylon.

On February 28, 1935, Carothers synthesized the first nylon-6,6 at the DuPont Experimental Station. This specific polymer possessed the exact elasticity and strength the team sought. While Carothers worked on nylon-6,6, Paul Schlack at IG Farben later developed nylon 6 in 1938. DuPont obtained a patent for the material in September 1938. The first commercial production plant opened in Seaford, Delaware, on December 15, 1939. This facility was so significant that the American Chemical Society named it a National Historic Chemical Landmark in 1995. Sadly, Carothers died 16 months before the public announcement of his success.

Nylon's journey to the public was a massive commercial success. The name "Nylon" was actually a marketing modification of the word "norun," meaning "no run."

Particolare di calza di nylon
Particolare di calza di nylon

It was first used in toothbrush bristles in 1938. However, it became most famous as women's stockings. At the 1939 New York World's Fair, nylon was presented as a miracle material. When stockings finally went on sale in 1940, they were an instant hit. In their first year alone, 64 million pairs were sold.

NMA.0028271, Fashion Photo by Erik Liljeroth 1954
NMA.0028271, Fashion Photo by Erik Liljeroth 1954

This high demand was supported by changing fashion trends, such as shorter hemlines.

World War II changed how nylon was used by the global community. Almost all nylon production was diverted from consumers to the military. The material was used to make essential items like parachutes and tents.

This wartime demand helped grow the industry and the importance of chemical engineering. When the war ended, the desire for consumer goods was so high that it caused "nylon riots." In Pittsburgh, an estimated 40,000 people lined up just to buy 13,000 pairs of stockings. Between 1945 and 1952, stockings and lingerie accounted for 80% of the world's nylon use.

Today, nylon remains a vital part of many different systems. It is used in textiles for apparel and flooring. It also provides strength in rubber reinforcement. In the automotive and electrical industries, it is used for molded components. Nylon films are also common in food packaging to keep items fresh. The ability to produce these materials at scale helped create thousands of jobs. For example, the original DuPont plant provided 1,800 jobs. This success demonstrated how chemical engineering can transform the economy and daily life.

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🖼️ Images & Media (10)
File:Nylon 6 and Nylon 6-6.svg
Nylon 6 and Nylon 6-6.svg
File:Wallace Carothers, in the lab.jpg
Wallace Carothers, in the lab.jpg
File:NMA.0028271, Fashion Photo by Erik Liljeroth 1954.jpg
NMA.0028271, Fashion Photo by Erik...
File:Particolare di calza di nylon.jpg
Particolare di calza di nylon.jpg
Nylon fibre SEM.tif
File:Condensation polymerization diacid diamine.svg
Condensation polymerization diacid diamine.svg
File:amide hydrolysis.svg
amide hydrolysis.svg
File:Nylon-3D-h bond.png
Nylon-3D-h bond.png
File:The worn out nylon stockings in this barrel full of salvaged stockings will be reprocessed and made into parachutes... - NARA - 196427.jpg
The worn out nylon stockings in this...
File:Blue nylon ball gown 2007.154.jpg
Blue nylon ball gown 2007.154.jpg
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