期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 214, 期 -, 页码 154-164出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2018.04.065
关键词
Epoxy resin; Flame retardant; Improvement on char formation; Enhanced physical properties
资金
- National Key Research and Development Program of China [2016YFB0302104]
- National Natural Science Foundation of China [51603200]
- Fundamental Research Funds for the Central Universities [WK2320000037]
A novel polymeric flame retardant poly (pentaerythritol phosphate phosphinic acyl piperazine) (PPAP) was synthesized successfully. The structure was confirmed by Fourier transform infrared spectra (FT-IR) and nuclear magnetic resonance spectra (NMR). The flame retardant property was characterized by limited oxygen index (LOI) and cone calorimetry test. Compared with 19% of epoxy resin, the LOI value of epoxy resin/PPAP composites (EP/PPAP) could reach high up to 35% when PPAP content was 20 wt % (EP-4) and the photographs of char residues demonstrated excellent char-forming ability of PPAP. The increasing char residues in thermogravimetric analysis (TGA) and analyses of real time FT-IR (RT-FTIR) showed improved thermal stabilities of EP/PPAP composites. The formation of enhanced stable char layer were proved by FT-IR, scanning electron microscopy (SEM) and Raman spectroscopy. The dynamic mechanical properties of EP/PPAP composites such as storage modulus and crosslinking density were substantially enhanced. (C) 2018 Published by Elsevier B.V.
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