Why nylon 6 6?
the nylon formed is called nylon 6–6 because on either side of the amide group are six carbon atoms (one of which is included in the amide function). All the nylons will be so named according to the number of carbon atoms present in their monomer(s) or comonomer(s).
It’s a polyamide semi-crystalline commonly used in monofilament form in applications such as bristles and brushes. Due to its low moisture absorption compared to other polyamides, it retains its properties better in the presence of water.
Etymology. From English nylon whose exact origin is not known with certainty. The most probable explanation is that it is an arbitrary sequence of letters with the final -on to rhyme with cotton (“cotton”) and rayon (“rayon”).
Wallace Hume CarothersNylon / Inventor
These two compounds are composed of 6 carbon molecules, which leads to the name of the polymer formed from these molecules nylon 6,6. The synthesis of nylon 6,6 is a type of polycondensation reaction.
We will thus find on the market nylons 6, 6-4, 6-6, 6-9, 6-10, 11, 12, etc. Nylon 6 (Perlon), invented by the German Paul Schlack, is made up of a single carbon chain constituting the repeating unit, and can be obtained by polymerization by opening at 215°C of a ring called ε-caprolactam:
There are many etymologies circulating on the origin of the word “nylon”, such as those stating that nylon comes from NY (New York) and LON (London), or even the first names of the wives of the inventors.
In 1950, the Englishman John T. Dickson developed polyester, also obtained by polycondensation; the best known is poly(ethylene terephthalate) (PET). In 1976, the manufacturer Schwarzkopf integrated nylon wheels for the first time on Revolution, which was the first roller coaster circuit to have them.