Oligoamide aus Dodecandisäure und 4,4′‐Methylendicyclohexylamin. (Oligoamide des „Qiana”︁‐Typs)

The pure isomers of cyclic monomers were synthesized besides the linear polymers by cyclocondensation reactions of dodecanedioyl dichloride and the pure isomers of 4,4′‐methylenedicyclohexylamine. The resulting cyclic amides were characterized by 1H NMR, IR and mass spectroscopy, as well as by HPLC and X‐ray diffraction. The content of these cyclic amides in “Qiana”‐Polyamide was determined by fractionated extraction and sublimation. Synthesis and properties of monomeric linear condensation product (dicarboxylic acid‐type with blocked and free end groups) are also described.