Investigation on the interaction between polyamide and lithium salts

FTIR spectroscopy and thermal analysis were applied to study the nylon 6-li thium salt systems. The DTA results show that lithium ions cause a signific ant reduction of the melting point of nylon-lithium salt samples. In additi on, lithium salts can also prevent eae crystallization of molten nylon in t he cooling process. Temperature-variable FTIR spectroscopy demonstrates tha t stronger hydrogen bonds form when nylon-lithium halide is molten. Such st ronger hydrogen bonds in molten nylon lithium systems may account for the r eduction of the melting point and delaying the crystallization of the amorp hous nylon. (C) 2000 John Wiley & Sons, Inc.