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Study on thermal degradation and flame retardant property of halogen‐free polypropylene composites using XPS and cone calorimeter
Author(s) -
Tsai KuangChung,
Kuan ChenFeng,
Chen ChiaHsun,
Kuan HsuChiang,
Hsu ShuWei,
Lee FangMei,
Chiang ChinLung
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.37700
Subject(s) - cone calorimeter , intumescent , fire retardant , char , materials science , x ray photoelectron spectroscopy , composite material , polypropylene , thermal decomposition , composite number , charring , carbonization , chemical engineering , scanning electron microscope , pyrolysis , chemistry , organic chemistry , engineering
In this study, the kind of halogen‐free flame‐retardant containing phosphorus and nitrogen was blended with polypropylene (PP) by hot melt to improve the flame‐retardant property of the composites. The cone calorimeter was used to investigate flame‐retardant property of the composites. The formation mechanism of the char obtained from the combustion under air atmosphere at 700° was studied by scanning electron microscopy (SEM) and X‐ray photoelectron spectroscopy (XPS). Results demonstrated that the PP composite containing nitrogen and phosphorus showed good flame retardancy from cone calorimeter. According to XPS results, it had been found that the intumescent char produces phosphorus and polyphosphorus acid during drastic decomposition, which act as dehydration agents to drive the formation of the heat‐resistant carbonaceous char by carbonization. There are also some glass materials, such as P 2 O 5 compound, which can benefit the flame retardance. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013