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Preparation, characterization, and thermal stability of novel PMMA/expandable graphite halogen‐free flame retardant composites
Author(s) -
Chen ChiaHsun,
Yen WeiHsin,
Kuan HsuChiang,
Kuan ChenFeng,
Chiang ChinLung
Publication year - 2010
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.20787
Subject(s) - thermogravimetric analysis , materials science , vinyltriethoxysilane , thermal stability , composite material , graphite , char , fire retardant , methacrylate , x ray photoelectron spectroscopy , chemical engineering , polymerization , silane , pyrolysis , polymer , engineering
In this investigation, expandable graphite was functionalized using a coupling agent to produce covalent bonds between the organic and inorganic phases, enhancing the thermal stability of the composites. The modified expandable graphite had an OEt function group that reacted with methyl methacrylate‐ co ‐3‐(trimethoxysilyl)propyl methacrylate. Fourier transform‐infrared spectrometry and X‐ray photoelectron spectra were adopted to characterize the grafting reaction between vinyltriethoxysilane and expandable graphite. It is affirmed that VTES has reacted with expandable graphite. The results of thermogravimetric analysis and thermogravimetric difference (TGΔ) reveal that functionalized expandable graphite can improve the thermal stability of composites. Scanning electron microscope was utilized to observe the morphology of the composites, and the behavior of expansion was discussed after the materials were burned. These results of X‐ray photoelectron spectra for char confirm that expandable graphite improves the degree of accumulation of char and that of the antioxidation of the composites. POLYM. COMPOS., 2010. © 2009 Society of Plastics Engineers