CHANGE OF FINE STRUCTURE OF NYLON 6 DURING DYEING WITH HEMATOXYLIN

Abstract

Changes of the fine structure of nylon 6 during dyeing with hematoxylin (C. I. Natural Black 1 and 2) has been studied by means of X-ray diffraction, dynamic mechanical measurements and stress-strain test. The following results were obtained.
(1) The swelling and the shrinkage increased with increasing concentration of hematoxylin.
(2) The (200) lattice spacing and crystallite size increased during the dyeing, but the (002) lattice spacing decreased.
(3) The temperatures giving the maximum values of tanδ for dyed specimens were lower than those of the undyed ones.
(4) The initial modulus increased with the increasing amount of absorbed dye.