Abstract
The halogen-free flame retardant (HFFR) polyphenylene ether (PPE)/styrene-ethylene/butylene–styrene block copolymer (SEBS) composites had been prepared using the melting compounding method by a twin-screw extruder. The thermal stability, flame retardancy, microscopic morphology of carbonaceous char, smoke density and mechanical properties of HFFR PPE/SEBS composites had been investigated by thermogravimetric analysis (TGA), cone calorimeter, limiting oxygen index (LOI), UL-94 (vertical flame) test, scanning electron microscopy (SEM), NBS smoke density chamber and ultimate tensile. The research indicated that the flame retardancy and char-forming of PPE/SEBS/aluminium diethylphosphinate (ADEP) composites had been dramatically improved. The more significant expansion of PPE/SEBS composites during combustion was found with the addition of synergistic agent zinc borate (ZB), and which demonstrated a very obvious improvement in flame retardancy. Moreover, due to the addition of synergistic flame retardant ZB, not only the flame retardancy was improved, but also the smoke release was significantly inhibited. The tensile performance test showed the ultimate tensile strength of PPE/SEBS composites maintained a relatively high level, and which can meet the application requirements of PPE-based cable sheath materials with higher strength requirements.
Published Version
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