COPOLYMERS OF NYLON-266 AND NYLON-66 - SYNTHESIS AND CHARACTERIZATION

Copolymers of nylon 266 and nylon 66 were prepared by interfacial polymerization of N-glycyl hexanediamine and hexanediamine with adipoyl chloride. According to the results of intrinsic viscosity measurements and GPC analysis, the molecular weights of the copolymers were relatively high. The structure of the copolymers was confirmed by FTIR, and the compositions were determined by H-1-NMR spectroscopy. The copolymers have similar solubility features as nylon 66. Both melting and glass transition temperatures showed a minimum at around 20-30% nylon 66 content. The copolymers are semicrystalline. Copolymers with lower T(m) could be melt-spun into fibers without appreciable thermal degradation.