Preparation and Performance Study of HDPE Composites Modified by Organosilicon Microspheres Synergies Intumescent Flame Retardant
The intumescent flame retardant(IFR)composed of piperazine pyrophosphate(PAPP)and melamine cyanurate(MCA)was used to improve the flame retardancy of high density polyethylene(HDPE)by introducing silicone microspheres(SRB)as synergist.The flame retardant properties of the composites were studied by vertical combustion(UL-94),oxygen index(LOI)and cone calorimetry(Cone)tests.The results showed that the P-5 composite could achieve UL-94 V-0 grade by adding only 18%IFR with 1%SRB,and the maximum heat release rate(pHRR)and total heat release(THR)decreased by 77.6%and 16.7%respectively compared with pure HDPE.SRB promoted the formation of carbon in IFR and improved the quality of carbon layer.IFR decreased the mechanical properties of HDPE,but SRB increased the tensile modulus of HDPE/IFR system.
Intumescent flame retardantSilicon microspheresHigh density polyethyleneHigh-quality carbon layer
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NSTL
万方数据
维普
