Preparation and Performance Study of HDPE Composites Modified by Organosilicon Microspheres Synergies Intumescent Flame Retardant

CAI An-hui, SONG Li-xin, LU Yao, LI Juan

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Plastics Science and Technology ›› 2024, Vol. 52 ›› Issue (03) : 55-61. DOI: 10.15925/j.cnki.issn1005-3360.2024.03.011
Processing and Application

Preparation and Performance Study of HDPE Composites Modified by Organosilicon Microspheres Synergies Intumescent Flame Retardant

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Abstract

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.

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Intumescent flame retardant / Silicon microspheres / High density polyethylene / High-quality carbon layer

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CAI An-hui , SONG Li-xin , LU Yao , et al. Preparation and Performance Study of HDPE Composites Modified by Organosilicon Microspheres Synergies Intumescent Flame Retardant. Plastics Science and Technology. 2024, 52(03): 55-61 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.03.011

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