Synergistic Effects of Novel Intumescent Flame Retardant Polypropylene Composites

doi:10.11901/1005.3093.2017.317

Chinese Journal of Materials Research

2017, Vol. 31

Issue (12): 901-908 DOI: 10.11901/1005.3093.2017.317

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Synergistic Effects of Novel Intumescent Flame Retardant Polypropylene Composites

Xiang DONG^1,², Zegong LIU^1,²(

), Shibin NIE^1,², Chi ZHANG^1,², Can ZHOU^1,², Wei WU^1,²

1 School of Energy Resources and Safety, Anhui University of Science and Technology, Huainan 232001, China
2. Key Laboratory of Safe and Effective Coal Mining of Ministry of Education, Huainan 232001, China

Cite this article:

Xiang DONG, Zegong LIU, Shibin NIE, Chi ZHANG, Can ZHOU, Wei WU. Synergistic Effects of Novel Intumescent Flame Retardant Polypropylene Composites. Chinese Journal of Materials Research, 2017, 31(12): 901-908.

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Abstract

Novel intumescent flame retarding polypropylene based composites were synthesized with silica-gel microencapsulated ammonium polyphosphate (OS-MCAPP) and tris (2-hydrooxyethyl) isocyanurate (THEIC) as intumescent flame retardants, while porous nickel phosphate (VSB-1) or nickel phosphate nanotubes (NiPO-NT) as synergist agent. Results show that with the addition of 4.0% VSB-1 or 3.0% NiPO-NT (in mass fraction), the composites show the optimal LOI value of 34.2, while the peak heat release rate reduced respectively by 40.7% and 38.1% in comparison with that of the composite without synergist. Moreover, these two composites show better thermal stability at 700℃ with residue mass of 207% and 239%, respectively, higher than that of the composite without synergist.

Key words: composite synergist intumscent flame retardant polypropylene

Received: 15 May 2017

ZTFLH:

TQ325

Fund: Supported by National Natural Science Foundation of China (No. 51474009)

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	Xiang DONG
	Zegong LIU
	Shibin NIE
	Chi ZHANG
	Can ZHOU
	Wei WU

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https://www.cjmr.org/EN/10.11901/1005.3093.2017.317 OR https://www.cjmr.org/EN/Y2017/V31/I12/901

Table 1 Formulations of the PP/IFR/synergist composites (mass fractiom, %)

Fig.1 Effect of the content of synergists on the LOI of novel PP/IFR composites (x% synergists and 30-x% IFR)

Fig.2 HRR (a) and THR (b) curves of PP0, PP1, PP5 and PP9

Fig.3 SPR (a) and TSP (b) curves of PP0, PP1, PP5 and PP9

Fig.4 Curves of the release of CO₂ (a) and CO (b) of PP0, PP1, PP5 and PP9

Fig.5 TG (a) and DTG (b) curves of PP0, PP1, PP5 and PP9 at N₂

Fig.6 SEM photographs of the outer surface of chars (a) PP1, (b) PP5 and (c) PP9

Fig.7 XPS curves of PP1 (a)、PP5 (b) and PP9 (c)

Table 2 Element content (atomic fraction, %) of char residue determined

Fig.8 Main mechanism of VSB-1 and NiPO-NT in novel PP/IFR composites

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