Flame retarded rigid polyurethane foam composites based on gel-silica microencapsulated ammonium polyphosphate

2021 ◽  
Vol 98 (1) ◽  
pp. 212-223 ◽  
Author(s):  
Yadong Yang ◽  
Wen Chen ◽  
Mengru Liu ◽  
Qingming Zhu ◽  
Xinliang Liu ◽  
...  
Keyword(s):  
Polyurethane Foam ◽  
Ammonium Polyphosphate ◽  
Rigid Polyurethane Foam ◽  
Flame Retarded ◽  
Microencapsulated Ammonium Polyphosphate

scholarly journals Density Effect on Flame Retardancy, Thermal Degradation, and Combustibility of Rigid Polyurethane Foam Modified by Expandable Graphite or Ammonium Polyphosphate

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 668 ◽  
Author(s):  
Yang ◽  
Liu ◽  
Jiang ◽  
Chen ◽  
Wan
Keyword(s):  
Weight Loss ◽  
Thermal Degradation ◽  
Heat Release ◽  
Polyurethane Foam ◽  
Apparent Density ◽  
Flame Retardancy ◽  
Ammonium Polyphosphate ◽  
Expandable Graphite ◽  
Rigid Polyurethane Foam ◽  
Combustion Behaviors

The current study aims at comparatively investigating the effect of apparent density on flame retardancy, thermal degradation and combustion behaviors of rigid polyurethane foam (RPUF), RPUF/ expandable graphite (EG) and RPUF/ ammonium polyphosphate (APP). A series of RPUF, RPUF/EG and RPUF/APP samples with different apparent densities (30, 60 and 90 kg/m3) were prepared. The flame retardancy, thermal degradation, and combustion behaviors of each sample were investigated. Limiting oxygen index (LOI) results indicated that increasing apparent density was beneficial to the flame retardancy of all foam systems. The effect of apparent density on the enhancement of flame retardancy followed the sequence of RPUF < RPUF/APP < RPUF/EG. Thermogravimetric analysis (TGA) results showed that an increase in the apparent density can cause more weight loss in the first degradation stage and less weight loss in the second degradation stage for all foam systems. The combustion behaviors also showed significant differences. The samples with a higher apparent density showed a longer duration of heat release and higher total heat release (THR). The findings in this study demonstrated that apparent density played an important role in flame retardancy, thermal degradation, and combustion behaviors of RPUF, which must be paid more attention in the studies of flame-retardant RPUF.

scholarly journals Synthesis of a DOPO-triazine additive and its flame-retardant effect in rigid polyurethane foam

e-Polymers ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 235-243 ◽  
Author(s):  
Lin Liu ◽  
Rui Lv
Keyword(s):  
Flame Retardant ◽  
Polyurethane Foam ◽  
Cell Structure ◽  
Rigid Polyurethane Foam ◽  
Flame Resistance ◽  
Limiting Oxygen Index ◽  
Flame Retarded ◽  
Flame Retardant Properties ◽  
Mechanical Performances ◽  
Halogen Free

AbstractA DOPO (9,10-dihydro-9-oxa-10-phosphaphen-anthrene-10-oxide)-based halogen-free flame retardant (ODOPM-CYC) was synthesized and incorporated in rigid polyurethane foam (RPUF). The structure of ODOPM-CYC was characterized by Fourier transform infrared spectra (FTIR), 1H NMR and 31P NMR. The effects of ODOPM-CYC on the flame resistance, mechanical performances, thermal properties and cell structure of RPUF were also investigated. The results showed that the incorporation of ODOPM-CYC strikingly enhanced flame retardant properties of RPUF. The flame retarded RPUF acquired a limiting oxygen index (LOI) value of 26% and achieved UL-94 V-0 rating with the phosphorus content of 3 wt%. The smoke production rate (SPR) also showed an obvious decrease and total smoke release (TSR) was 39.8% lower than that of neat RPUF. Besides, the results demonstrated that the incorporation of ODOPM-CYC provided RPUF better thermal stability but did not show any obvious influence on its thermal conductivity.

Effects of ammonium polyphosphate microencapsulated on flame retardant and mechanical properties of the rigid polyurethane foam

2020 ◽  
Vol 137 (48) ◽  
pp. 49591
Author(s):  
Jiaji Cheng ◽  
Shaoshuai Niu ◽  
Dan Ma ◽  
Yue Zhou ◽  
Feng Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Polyurethane Foam ◽  
Ammonium Polyphosphate ◽  
Rigid Polyurethane Foam

Enhanced thermal stability and flame retardancy of polyurethane foam composites with polybenzoxazine modified ammonium polyphosphates

RSC Advances ◽  
2016 ◽  
Vol 6 (16) ◽  
pp. 13418-13425 ◽  
Author(s):  
Fubin Luo ◽  
Kun Wu ◽  
Mangeng Lu
Keyword(s):  
Thermal Stability ◽  
Thermal Behavior ◽  
Polyurethane Foam ◽  
Flame Retardancy ◽  
Ammonium Polyphosphate ◽  
Rigid Polyurethane Foam

The influence of polybenzoxazine modified ammonium polyphosphate (BMAPP) on the thermal behavior and flame retardancy of a rigid polyurethane foam (PU) are investigated using various techniques.

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