The invention relates to a preparation method of a nylon-6-based polyesteramide
fiber. The method comprises the steps of carrying out
melt spinning on a nylon-6-based polyesteramide
polymer to obtainthe nylon-6-based polyesteramide
fiber. A preparation method of the nylon-6-based polyesteramide
polymer comprises the steps of mixing nylon-6
prepolymer ester with a
polyester prepolymer and then carrying out an ester exchange reaction to obtain the nylon-6-based polyesteramide
polymer. The nylon-6
prepolymer ester is prepared by firstly synthesizing a dibasic-acid-terminated nylon-6 prepolymer and then adding dihydric
alcohol to enable dihydric
alcohol to react with carboxyl of terminal groups. According to the preparation method of the nylon-6-based polyesteramide
fiber, the nylon-6-based polyesteramide polymer is obtained through a copolymerization approach, so that the uniformity of nylon-6 and
polyester blocks is improved, and the
phase domain is controllable; polyesteramide slices containing
polyester chain segments at different ratios can be obtained by changing the addition quantity of the polyester prepolymer, so that the
sequence structure is controllable, and the
polymerization process is flexible. The prepared fiber has high spinnability and stiffness and can be applied to the fields of clothing, home textiles, automobile interior decoration and the like.