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PCPBO considerably reduced the ammability of EP, reected
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the char increased with PCPBO content. The results from SEM 20 L. J. Qian, L. J. Ye, G. Z. Xu, J. Liu and J. Q. Guo, Polym.
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char residue effectively prevented the heat and oxygen 21 L. P. Gao, D. Y. Wang, Y. Z. Wang, J. S. Wang and B. Yang,
g
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Polym. Degrad. Stab., 2008, 93, 1308–1315.
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Acknowledgements
This research is nancially supported by the National Natural
Science Foundation of China for the Projects (21204079,
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17614 | RSC Adv., 2014, 4, 17607–17614
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