Journal
POLYMER DEGRADATION AND STABILITY
Volume 151, Issue -, Pages 144-151Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2018.03.007
Keywords
Intumescent flame retardant; Mono-component; Polypropylene
Categories
Funding
- National Key Research and Development Program of China [2016YFC0800605]
- National Natural Science Foundation of China [51403196]
- Fundamental Research Funds for the Central Universities [WK2320000037]
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A novel mono-component intumescent flame retardant, named as hyper-branched triazine-piperazine pyrophosphate (HTPPP), is synthesized by using cyanuric chloride, 1-boc-piperazine and phosphoric acid. Chemical structures of HTPPP are characterized by fourier transform infrared (FUR) spectra, P-31 nuclear magnetic resonance (NMR), solid-state C-13 NMR, elemental analysis (EA) and inductively coupled plasma mass spectrometer (ICP-MS). The resulting HTPPP is used alone as an intumescent flame retardant for polypropylene (PP). PP/HTPPP composite can achieve a limiting oxygen index (LOI) value of 30.5% and the vertical burning test (UL-94) V-0 rating at 25 wt% HTPPP loading. Besides, HTPPP is thermally stable with initial decompose temperature as high as 275 degrees C in air atmosphere. The flame retardant mechanism is concluded based on the analysis of the char residue. (C) 2018 Published by Elsevier Ltd.
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