Synergistic effects of ammonium polyphosphate and red phosphorus with expandable graphite on flammability and thermal properties of HDPE/EVA blends

2015 ◽  
Vol 27 (1) ◽  
pp. 52-60 ◽  
Author(s):  
Mengqi Tang ◽  
Fei Qi ◽  
Man Chen ◽  
Zhidan Sun ◽  
Yang Xu ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Synergistic Effects ◽  
Ammonium Polyphosphate ◽  
Expandable Graphite ◽  
Red Phosphorus

Synergistic effects of expandable graphite with magnesium hydroxide on the flame retardancy and thermal properties of polypropylene

2007 ◽  
Vol 47 (11) ◽  
pp. 1756-1760 ◽  
Author(s):  
Xiaolang Chen ◽  
Hong Wu ◽  
Zhu Luo ◽  
Bo Yang ◽  
Shaoyun Guo ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Magnesium Hydroxide ◽  
Flame Retardancy ◽  
Synergistic Effects ◽  
Expandable Graphite

Synergistic effects of red phosphorus masterbatch with expandable graphite on the flammability and thermal stability of polypropylene/thermoplastic polyurethane blends

2019 ◽  
Vol 28 (3) ◽  
pp. 209-219 ◽  
Author(s):  
Na Wang ◽  
Lingtong Li ◽  
Yang Xu ◽  
Kun Zhang ◽  
Xiaolang Chen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Heat Release ◽  
Flame Retardant ◽  
Synergistic Effects ◽  
Thermoplastic Polyurethane ◽  
Expandable Graphite ◽  
Gravimetric Analysis ◽  
Red Phosphorus ◽  
Limiting Oxygen Index ◽  
Ul 94

The flammability characterization and synergistic effects of red phosphorus masterbatch (RPM) with expandable graphite (EG) in flame-retardant polypropylene (PP)/thermoplastic polyurethane (TPU) composites are investigated by limiting oxygen index, UL-94 testing, cone calorimeter tests, thermal gravimetric analysis, Fourier transform infrared (FTIR), and scanning electron microscopy. The results show that the flame retardancy of PP/TPU/EG/RPM composites is greatly influenced by RPM. The synergistic effects between RPM and EG take place in the flame-retardant composites. The presence of RPM with EG decreases significantly the heat release rates and total heat release, and UL-94 V-0 rating is achieved when suitable amount of RPM substitutes for EG in the PP/TPU/EG/RPM composites. The T onset and T 10 wt% of the composites are improved because of the presence of RPM. The FTIR spectra show that the incorporation of RPM improves the thermo-oxidative stability of PP/TPU at higher temperatures. The morphological observations indicate the reinforcement of thermal stability, and flame-retardant performance is attributed to the compact and stable char layers promoted by RPM with EG acted as an effective heat barrier and thermal insulation.

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