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.