AN INVESTIGATION OF THE REACTION BETWEEN NYLON-66 AND LICL BY HIGH-RESOLUTION SOLID-STATE NMR-SPECTROSCOPY

The interaction between nylon 66 and a mixture of lithium chloride and dimethyl sulfoxide was studied by solid-state C-13 and Li-7 NMR spect roscopy. A model compound was prepared from a homogeneous solution of nylon 66, lithium choloride, and deuterated dimethyl sulfoxide or dime thyl sulfoxide. Techniques used include magic angle spinning, cross-po larization between H-1 and either C-13 or Li-7, and H-1 spin-diffusion . It is thought that lithium chloride and the molecules of dimethyl su lfoxide form a complex. Partial reaction between nylon 66 and the comp lex was observed prior to heat treatment. It is shown that heat-treatm ent increases the rate of this reaction.