Nylon 12 is a polymer with the formula ()n. It is made from ω-aminolauric acid or laurolactam monomers that each have 12 carbons, hence the name ‘Nylon 12’. It is one of several nylon polymers.〔Wolfgang. Griehl , Djavid. Ruestem "Nylon 12-Preparation, Properties, and Applications" Ind. Eng. Chem., 1970, vol. 62, pp 16–22. 〕
Nylon 12 can be produced through two routes. The first being polycondensation of ω-aminolauric acid, a bifunctional monomer with one amine and one carboxylic acid group.
n H2N(CH2)11CO2H → ()n + n H2O
The second route is ring-opening polymerization of laurolactam at 260-300˚C. Ring opening can be carried out by cationic or anionic initiators, although cationic initiators have not been used commercially due to the product being less stable and oxidized relatively quickly in comparison to those produced by activated anionic polymerization (monomer casting).〔
〕Ring-opening polymerization is the preferred route for commercial production.
:n () → ()n
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