The flame retardant H-PP composite was prepared by using packing box PP waste plastic(H-PP)as raw material,intumescent flame retardant(IFR)as flame retardant,organic vermiculite(OVMT)and carbon microspheres(CMS)as flame retardant coefficent.The limited oxygen index(LOI),flame retardant grade of UL 94 and mechanical properties of the composites were measured and analyzed by TG,conical calorimeter and SEM.The results showed that:OVMT and IFR had synergistic flame retardancy effect in H-PP.When 4％OVMT and 24％IFR were added into H-PP,the LOI of composite was 29.8％and the flame retardancy reaches UL 94 V-0 level.The addition of OVMT improved the mechanical properties of IFR/H-PP;CMS and IFR had synergistic flame retardant effect in H-PP,and CMS could improved the mechanical properties of IFR/H-PP;When OVMT and CMS were added simultaneously to IFR/H-PP,the flame retardancy and mechanical properties were improved,the LOI of 2-OVMT/2-CMS/24-IFR/H-PP was 32.4％,the flame retardant reached UL 94 2.0 mm V-0 level,the tensile strength,bending modulus,bending strength and notched impact strength were 22.5,1 132.1,26.2 MPa and 3.8 kJ/m2,respectively,which the increased 1 1.9％,0.3％,8.3％and 31.0％compared with 28-IFR/H-PP.
维普
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