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Nylon

From Simple English Wikipedia, the free encyclopedia
A knot, on a rope, made of Nylon
Nylon 6,6Nylon 6,6 unit
Density1.15 g/cm3
Electrical conductivity (σ)10−12 S/m
Thermal conductivity0.25 W/(m·K)
Melting point463–624K
190–350 °C
374–663 °F
Nylon stockings, being inspected, in 1954.

Nylon is a type ofsynthetic fiber. It is one of the most commonly usedpolyamides, and was first used on February 28, 1935.[1]

Nylon makes asilky material which was first used intoothbrushes. It is strong, hard and water resistant. It is used to make clothes. In fact, polyamides are mostly used for synthetic fibres inclothing. Nylon can also be used to make other materials, such asparachutes,ropes,string fortyres,carpets,fishing nets andcloth andsocks.

Nylon was invented byWallace Carothers atDu-Pont.[2][3]

Types of nylon

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Chemical structures of nylon 6 and nylon 66.

There are many different types of nylon, made from different ingredients in different ways. The two main types of nylon arehomopolymer nylon, made from a single chemical, andheteropolymer nylon, made from more than one chemical.

Nylons are numbered based on the number ofcarbon atoms in their ingredients. A small number usually means a homopolymer, while a larger number or two numbers with a separator (such as a slash or comma) usually means a heteropolymer.

The two most common types of nylon are nylon 6 (a homopolymer made fromcaprolactam, with 6 carbon) and nylon 66 (a heteropolymer made fromadipic acid andhexamethylenediamine, with 6 carbon each). These two molecules are very similar in structure, with the only difference being how theamide groups are arranged: in nylon 6, allC(=O)−N bonds are in the same direction, while they alternate in nylon 66.

References

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  1. Palmer R.J. 2001. Polyamides, plastics. InEncyclopedia of Popolymer science and technology.doi:10.1002/0471440264.pst251
  2. American Chemical Society National Historic Chemical Landmarks."Foundations of Polymer Science: Wallace Hume Carothers and the Development of Nylon".ACS Chemistry for Life. Retrieved27 January 2015.
  3. "Wallace Hume Carothers".Science History Institute. June 2016. Retrieved20 March 2018.
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