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Thermal properties and flame retardancy of polycarbonate/hydroxyapatite nanocomposite
Author(s) -
Dong QuanXiao,
Chen QianJin,
Yang Wei,
Zheng YiLei,
Liu Xin,
Li YuanLi,
Yang MingBo
Publication year - 2008
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.28053
Subject(s) - thermogravimetric analysis , polycarbonate , materials science , limiting oxygen index , nanocomposite , x ray photoelectron spectroscopy , char , composite number , thermal decomposition , fourier transform infrared spectroscopy , thermal stability , scanning electron microscope , chemical engineering , activation energy , composite material , pyrolysis , chemistry , organic chemistry , engineering
The thermal degradation of polycarbonate (PC) and polycarbonate/hydroxyapatite (PC/HAP) composite was investigated by the thermogravimetric analysis (TGA) and the decomposition activation energy was calculated by Kissinger method. It was found that the first step decomposition activation energy ( E a 1 ) was higher than that of pure PC while the second step decomposition ( E a 2 ) decreased a little. The limiting oxygen index (LOI) of PC/HAP composite with 0.5 wt % HAP reached 34. The carbon char of PC and PC/HAP composite after combustion was analyzed by scanning electron microscopy (SEM), X‐ray photoelectron spectroscopy (XPS), and flourier transform infrared spectroscopy (FTIR) and similar morphology, components, and the same functional groups were found in the char residues. Based on these results, it can be concluded that a low content of HAP in PC matrix can significantly improve the thermal properties and flame retardancy of the composite. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008