Influence of Nano-SiO₂ on the Properties of Mg(OH)₂/PE Halogen-free Flame-retardant Composite

The Mg(OH)₂/PE halogen－free flame－retardant composites were modified by nano－SiO₂ in this paper. The effects of differentnano－SiO₂ contents on the mechanical properties and flame retardance of composites were studied. The results showed that the Mg(OH)₂/SiO₂/PE composites had better flame retardance than the Mg(OH)₂/PE composites as the norganic filler content was the same. Nano－SiO₂ can effectively improve the flame retardance and mechanical properties of Mg(OH)₂/PE halogen－free flame－retardant composite. When the Mg(OH)₂/SiO₂ content was 40%, the oxygen index of the Mg(OH)₂/SiO₂/PE composites showed a increase of 74% compared with the pure PE, while the mechanical properties of composite was still good.