Preparation of Flame Retardant Polyamide 6 Fibers with Melamine Cyanurate and Bicyclic Phosphates via Melt Spinning

Abstract

Melamine cyanurate (MCA) and bicyclic phosphates (BP) were combined and added into polyamide6 (PA6) with the polyethylene oxide (PEO) as dispersing agent by melt blend, then the flame retardant PA6 fibers were prepared by melt spinning. Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) were utilized to characterize the morphology and properties of the blends. The results indicated that the MCA particles with diametric size about 400nm are highly uniformly in the PA6 matrix, the spinnability and tensile strength of flame retardant PA6 fibers declined due to co-addition of MCA and M102B, TGA showed the flame retardant PA6 fibers decomposed early and retained high solid residue. From Flammability testing, an increase of oxygen index to 33.2% and an improvement of the UL-94 classification to V-0 were observed.