13C-NMR Sequence Analysis. XIV. Ternary Aliphatic Copolyamides

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Abstract
Ternary copolyamides were obtained either by anionic copolym-erization of ∊-caprolactam, ω-capryllactam, and ω-laurinlactam or by cocondensation of AH-salt with e-caprolactam and ω-laurinlactam. These copolyamides contain nine different amide groups which can be identified by their CO-signals in the 90.5 MHz 13C-NMR spectra. From the intensities of the CO signals, the ratio of monomer units in the copolymers and hence the reactivity of the monomers can be estimated. Furthermore, the average length of the homogeneous blocks can be calculated.