Premium
Synergistic effects of expandable graphite with magnesium hydroxide on the flame retardancy and thermal properties of polypropylene
Author(s) -
Chen Xiaolang,
Wu Hong,
Luo Zhu,
Yang Bo,
Guo Shaoyun,
Yu Jie
Publication year - 2007
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20867
Subject(s) - limiting oxygen index , flammability , materials science , thermogravimetric analysis , fire retardant , polypropylene , composite material , particle size , thermal stability , fourier transform infrared spectroscopy , magnesium , particle (ecology) , graphite , composite number , chemical engineering , pyrolysis , metallurgy , char , engineering , geology , oceanography
In this study, the flammability characterization and synergistic effects of different particle size of expandable graphite (EG) with modified magnesium hydroxide (MH) in flame‐retardant polypropylene (PP) composites were studied by limiting oxygen index (LOI), UL‐94 test, thermogravimetric analysis (TGA), and fourier transform infrared (FTIR) spectroscopy. The results showed that the particle size of EG had a great effect on the flammability of the PP/MH/EG composites. The EG2 with smaller particle size could apparently increase the LOI value and improved the UL‐94 flammability properties rating of the PP composites. The data obtained from the TGA and FTIR curves indicated that the thermo‐oxidative stability of PP/MH/EG composites increased with decreasing particle size of EG. And the smaller the particle size of EG, the higher the residues of the composite. POLYM. ENG. SCI., 47:1756–1760, 2007. © 2007 Society of Plastics Engineers