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This work presents a study of the infl uence of diethyl aluminum phosphinate (EOP) and sodium alumino silicate (ZP) as the novel green fl ame retardant spinning additives on the thermal properties of polyamide 6 (PA6) fi bres. The PA6/additive composite fi laments were prepared at 4 wt% concentration of additives and their mixture by melt spinning. The results show that the additives were physically incorporated into the PA6 fi lament, resulting in an insignifi cant change of the melting temperature. The presence of EOP decreased Tonset and increased Tmax2 compared to pure PA6, which indicates that the degradation process started at lower temperature, whereas the thermo-oxidative stability in the second decomposition step increased. Contrary to EOP, ZP did not cause any noticeable changes in the decomposition temperatures comparing to pure PA6, but signifi cantly increased the fi nal char amount. Both phenomena were also observed when the additives were used in combination. Whereas EOP did not signifi cantly aff ect the mechanical fi lament properties, the incorporation of ZP resulted in the reinforcement of fi bres.

Influence of Flame Retardant Additive on Thermal Behaviour and Stability of Fibre-Forming Polyamide 6