可膨胀石墨在硬质聚氨酯泡沫阻燃性能中的研究

Flame Retardants Study of Expandable Graphite in Rigid Polyurethane Foams

对近年出现的一种新型膨胀阻燃剂———可膨胀石墨(EG)在硬质聚氨酯泡沫塑料(RPUF)中的阻燃性能与其它几种无卤阻燃剂作了比较。用氧指数(LOI)法研究了EG与聚磷酸铵(APP)、磷酸三乙酯(TEP)、三聚氰胺(MA)、三聚氰胺氰脲酸盐(MC)等无卤阻燃剂在RPUF中的协同阻燃作用。结果表明,EG阻燃RPUF的效果最好;并且EG与这些无卤阻燃剂之间存在着协同或反协同作用,其中EG与两种含磷阻燃剂APP和TEP的协同效果最好。

Recently,a novel flame retardant ——expandable graphite (EG) has appeared in literatures.The comparisions were made between the flame retardant behavior of EG and that of some halogen-free flame retardants (HFFR) in rigid polyurethane foams (RPUF).And the synergistic effects of EG with some HFFR in RPUF were studied by the approach of limited oxygen index (LOI).The results show that EG is the best flame retardant in RPUF,and the synergistic effects of EG with ammonium polyphosphate (APP) and triethylphosphate (TEP) in RPUF are the best.