三聚氰胺氰尿酸盐/氧化锑/石墨烯复合阻燃玻璃纤维增强聚酰胺6复合材料

研究了阻燃剂三聚氰胺氰尿酸盐（MCA）/氧化锑（Sb2O3）和石墨烯（GP）对玻璃纤维（GF）增强聚酰胺6（PA6）复合材料性能的影响。结果表明，MCA/Sb2O3（质量比为70/30）的加入改善了PA6和GF的相容性，与不添加阻燃剂的PA6/GF相比，当MCA/Sb2O3含量为30份时，复合材料的强度、刚性和阻燃性能显著提高；GP的加入对PA6/GF的力学性能影响不大，但阻燃性能明显提高，当GP的含量为0.3份时，复合材料的极限氧指数达到30.1 %，阻燃等级达到UL 94 V-0级；GP在PA6/GF的燃烧过程中具有促进炭化和发泡双重作用。

Flame-retardancy of Glass-fiber-reinforced Polyamide 6 Composites with Melamine Cyanurate/Antimony Oxide/Graphene

This article reported the flame-retardant effect of melamine cyanurate (MCA)/antimony oxide (Sb2O3)/graphene on glass-fiber-reinforced polyamide 6 (PA6) composites. The introduction of MCA and Sb2O3 enhanced the compatibility of PA6 and glass fiber (GF) at a weight ratio of 70/30, and the mechanical strength, rigidity and flame-retardant properties of the composites were improved significantly with addition of 30 phr of MCA/Sb2O3 mixture. The addition of graphene almost did not affect the mechanical performance of the composites but enhanced their flame-retardant properties remarkably. The composites achieved a limiting oxygen index of 30.1 vol% and UL94 V-0 classification with addition of 0.3 phr of graphene, which promoted both carbonization and foaming action during the combustion of the composites.