Phosphorus and Nitrogen-Containing Polyols: Synergistic
Effect on the Thermal Property and Flame Retardancy of Rigid Polyurethane
Foam Composites
Yao Yuan
Hongyu Yang
Bin Yu
Yongqian Shi
Wei Wang
Lei Song
Yuan Hu
Yongming Zhang
10.1021/acs.iecr.6b02942.s001
https://acs.figshare.com/articles/journal_contribution/Phosphorus_and_Nitrogen-Containing_Polyols_Synergistic_Effect_on_the_Thermal_Property_and_Flame_Retardancy_of_Rigid_Polyurethane_Foam_Composites/4003953
In this work, the
investigation mainly focused on the synergistic
effect of phosphorus-containing polyol (BHPP) and nitrogen-containing
polyol (MADP) in improving the flame retardancy of EG/rigid polyurethane
foam (RPUF). BHPP and MADP were synthesized through dehydrochlorination
and Mannich reaction, respectively. The influence of the weight ratio
of BHPP and MADP was studied by thermogravimetric analysis and limiting
oxygen index (LOI) tests. The results demonstrated that the optimal
weight percentage of BHPP and MADP in flame-retarding RPUF was 1/1.
In addition, the incorporation of expandable graphite (EG) into the
RPUF/BHPP/MADP system could greatly improve the flame-retardant properties
of RPUF composites. When the content of EG was 15 wt %, LOI value
of RPUF composites reached 33.5%. Furthermore, the value of the peak
of the heat release rate was reduced by 52.4% compared to that of
pristine RPUF. Based on the analysis and discussion, a condensed flame-retardant
mechanism was primarily proposed.
2016-09-27 00:00:00
BHPP
MADP
EG
LOI
Rigid Polyurethane Foam Composites
RPUF composites
heat release rate