Synergistic effect of decabromodiphenyl ethane and montmorillonite on flame retardancy of polypropylene
writer：Xiao-Sui Chen a , Zhong-Zhen Yu b , Wei Liu a , Sheng Zhang a,b,
keywords：Montmorillonite, Decabromodiphenyl ethane, Antimony trioxide, Flame retardancy, Polypropylene
source：期刊
Issue time：2009年
Polypropylene (PP) is melt-compounded in a twin-screw extruder with surface-modified deca-
bromodiphenyl ethane/antimony trioxide (DBDPE/Sb2O3) and organically modified montmorillonite
(OMMT). The intercalation and dispersion microstructure of OMMT in the nanocomposites are investi-
gated by X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy
(TEM). Thermal stability and char residue are characterized by thermogravimetric and differential
thermal analysis (TGA–DTA). Flame retardant properties are evaluated by limited oxygen index (LOI) and
UL-94 vertical burning test.
The results indicate that better flame retardancy can be achieved for the composite containing
a modified mixture DBDPE/Sb2O3. The presence of DBDPE/Sb2O3 could improve the dispersion of OMMT
in polypropylene, leading to higher thermal stability and more char residue. A synergistic effect between
OMMT and DBDPE/Sb2O3 has been observed and discussed.