Thermal, morphological and mechanical properties of glass fiber reinforced star‐branched polyamide 6

Using star-branched polyamide 6 (SPA6) with hexafunctional cyclotriphosphazene core as a matrix resin and glass fiber (GF) as a reinforcing material, star-branched polyamide 6/glass fiber (SPA6/GF) composites with different GF content were prepared by melt-compounding method. The star-branched structure of SPA6 and GF content have great effects on the properties of SPA6/GF composites. Compared with linear polyamide 6 (LPA6), SPA6 with star-branched structure has low viscosity, high melt flowability and good impregnation and adhesion to GF, which endow SPA6/GF composites outstanding processability, good surface qualities and excellent mechanical properties even when the content of GF reaches 60 wt%. The use of SPA6 resin with star-branched structure fundamentally solves the industry problem of traditional LPA6 resin in high-filled modification. Such high-performance SPA6/GF composites will provide great promise for large-scale applications.