Linear Unsaturated Polyamides: Nylons 6 u18 and 18 u18
Polymers and High Performance Materials
Linear unsaturated nylons 6 u18 and 18 u18 have been made containing a double bond in the center of the diacid segment with potential for additional functionalization. Solution state NMR showed the presence of a small portion of cis amide units. Solid state NMR verified the presence of the double bond in the bulk, and that the polyamides were present in the alpha-crystalline form. Thermal stability was comparable to linear saturated nylons, and the melting and crystallization temperatures of the unsaturated nylons were lower compared to the saturated analogs.
Macromolecular Chemistry and Physics
Mathias, L. J.
(2004). Linear Unsaturated Polyamides: Nylons 6 u18 and 18 u18. Macromolecular Chemistry and Physics, 205(18), 2438-2442.
Available at: http://aquila.usm.edu/fac_pubs/2950