碳纳米管对膨胀阻燃天然橡胶的燃烧和力学性能的影响

doi:10.11896/cldb.21010074

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Abstract The intumescent flame retardant natural rubber (NR) composites based on multi-walled carbon nanotubes (MCNTs), carboxyl modified multi-walled carbon nanotubes (CCNTs) and intumescent flame retardants were prepared by mechanical blending, respectively. The intumescent flame retardant is composed of ammonium polyphosphate, melamine and corn starch in a weight ratio of 3∶1∶1. The flammability, thermal stability and mechanical properties of intumescent flame retardant NR composites were studied by limiting oxygen index test, UL-94 test, cone calorimeter test, thermogravimetric-Fourier transform infrared spectroscopy, scanning electron microscopy and tensile test. The results show that compared with NR3, the peak of heat release rate and total smoke production of NR3/2MCNTs decreased by 9.6% and 17.9%, respectively. The peak of heat release rate and total smoke production of intumescent flame retardant NR composites were reduced by adding MCNTs, but the combustion time was advanced. The char residue of NR3/2CCNTs is 12.7% higher than that of NR3. Carboxyl-modified carbon nanotubes can promote the increase of char residues of intumescent flame retardant NR composites. In addition, the tensile stress of intumescent flame retardant NR composites was improved by adding MCNTs and CCNTs.

Key words： natural rubber carbon nanotubes flammability thermal stability mechanical property

Published: 10 March 2022 Online: 2022-03-08

CLC number:

TQ314

Fund:National Natural Science Foundation of China (51676103).

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	Articles by authors
	ZHANG Xiaoguang
	SHI Haijun
	LIU Jie
	DANG Mang
	HE Yan

Cite this article:

ZHANG Xiaoguang,SHI Haijun,LIU Jie, et al. Effect of Carbon Nanotubes on Flammability and Mechanical Property of Intumescent Flame Retardant Natural Rubber[J]. Materials Reports, 2022, 36(5): 21010074-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21010074 OR http://www.mater-rep.com/EN/Y2022/V36/I5/21010074

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