呋喃基磷酰胺类阻燃剂的合成及其在阻燃PA6中的应用

Synthesis and application of furan-based phosphoramidite flame retardants for flame-retardancy of PA6

为了抑制聚酰胺6(PA6)在燃烧过程中的放热情况,将可以在高温下成炭的呋喃基团引入到了阻燃剂中,设计并合成了一系列含有呋喃基团的阻燃剂,通过极限氧指数(LOI)、垂直燃烧试验和锥形量热仪对其阻燃抑热性能及机理进行了研究。结果表明,呋喃基团在不同的外部环境及内部形态下会表现出不同的抑热效果,加入了大分子阻燃剂的PA6样品在锥形量热仪测试中的抑热效果优于加入小分子阻燃剂的PA6样品。

To inhibit the exothermic situation of polyamide 6(PA6)during combustion,furan groups that can char at high temperature were introduced into flame retardants.A series of flame retardants containing furan groups were designed and synthesized,and their flame-retardant and heat-inhibition properties as well as corresponding mechanisms were investigated by means of limiting oxygen index,vertical combustion experiment,and cone calorimetry.The results indicated that the furan groups could generate different heat suppression effects under different external environments and internal morphologies.The PA6 compounds containing large-molecule flame retardants exhibited a better heat suppression effect than those with small-molecule flame retardants according to the cone calorimetric test results.