• nylon-6;
  • nylon-6/clay nanocomposite;
  • fiber;
  • crystal structure;
  • mechanical property


The crystal structures of nylon-6 and nylon-6/clay fibers were investigated on annealing and drawing. Annealing increased the γ-crystalline form of both fibers, as indicated by the DSC curves, and its effect was dominant in nylon-6/clay fiber. On drawing, the γ-crystalline form was easily converted into the α form in nylon-6, whereas it was still observed at a relatively high spin-draw ratio in nylon-6/clay fiber. However, although the α-crystal form was dominant in nylon-6, the γ-crystal form was dominant in nylon-6/clay with annealing and drawing, on the basis of the XRD data. The fast crystallization rate of nylon-6/clay compared with pure nylon-6 was confirmed, on the basis of the Avrami exponent. The initial modulus of nylon-6/clay fiber was 30 % higher than the neat nylon-6 fiber. The reinforcing effect of clay on the dynamic storage modulus was observed. Copyright © 2004 Society of Chemical Industry