Flame-retardant effect of tannic acid-based intumescent fire-retardant applied on flammable natural rubber

Wang, Jingchao; Wang, Xueya; Zhou, Ziwen; Liu, Xiaoyang; Xu, Meiming; Zhao, Fa; Zhao, Feng; Li, Song; Liu, Zhihua; Li, Lin; Zhao, Shuai

doi:10.1039/d2ra04682b

Cited by 10 publications

(1 citation statement)

References 38 publications

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“…Figure 11 and Table S3 show that peak fitting is performed for each spectrum to resolve the curve into D and G bands ( Figure 11 ). The combined intensity (I D /I G ) reflects the graphitization degree of residual carbon, and the lower the I D /I G value is, the better the residual carbon structure is [ 33 , 34 , 35 ]. Obviously, the I D /I G ratio in this study follows the sequence of EPDM/AEG40 < EPDM/AE40 < EPDM/AG40, which indicates that EN can promote the formation of highly graphitized and insulating carbon layers, which is the main mechanism for suppressing flammability.…”

Section: Resultsmentioning

confidence: 99%

The Study of Enteromorpha-Based Reinforcing-Type Flame Retardant on Flame Retardancy and Smoke Suppression of EPDM

et al. 2022

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Enteromorpha, as a waste from marine pollution, brings great pressure to environmental governance every year, especially for China. Under the premise of a shortage of industrial materials, taking appropriate measures can turn waste into wealth, which will benefit us a lot. In this work, a bio-based reinforcing-type flame retardant based on Enteromorpha is designed. The designed Enteromorpha-based flame retardant system (AEG) mainly focuses on the reinforcing and flame retardant effects on ethylene-propylene-diene tripolymer (EPDM). For the AEG system, ammonium polyphosphate (APP) serves as both the acid source and the gas source; the simple hybrid material (GN) produced by loading graphene (GE) and Enteromorpha (EN) using tannic acid (TA) as a regulator serves as an acid source and a carbonizing source. The results show that when 40 phr AEG is added, the LOI of EPDM/AEG40 reaches 32.5% and the UL-94 reaches the V-0 level. The PHRR and THR values of EPDM/AEG40 are 325.9 kW/m2 and 117.6 MJ/m2, respectively, with decrements of 67.3% and 29.7%, respectively, compared with the results of neat EPDM composite. Especially, the TSP and TSR values of EPDM/AEG40 are reduced from 15.2 m2 of neat EPDM to 9.9 m2 with a decrement of 34.9% and reduced from 1715.2 m2/m2 of neat EPDM to 1124.5 m2/m2 with a decrement of 34.4%, indicating that AEG is effective in flame retardancy and smoke suppression. Meanwhile, the tensile strength and tear strength of EPDM/AEG composites are much higher than neat EPDM, therefore, with the future development of innovate reinforcing-type flame-retardant Enteromorpha, the application of Enteromorpha in the polymer flame-retardant field will surely usher in bright development.

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Section: Resultsmentioning

confidence: 99%

The Study of Enteromorpha-Based Reinforcing-Type Flame Retardant on Flame Retardancy and Smoke Suppression of EPDM

et al. 2022

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Effect of aluminum diethylphosphinate/aluminum hypophosphite on the high abrasion and flame resistance of NR/BR composites

Xu,

Ma,

Guo

et al. 2024

J of Applied Polymer Sci

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The flame‐retardants aluminum diethylphosphinate (ADP) and aluminum hypophosphite (ALHP) were introduced into natural rubber (NR) and butadiene rubber (BR) to prepare composites. The effects of the two flame‐retardants on the processing characteristics, physical properties, flame resistance, mechanical properties and abrasion resistance of the composites were studied and compared. Results showed that both flame‐retardants delayed the vulcanization of the composites and increased the Mooney viscosity and ADP exhibited a more evident increase. Both ADP and ALHP improved the flame resistances of the composites, but the ADP improvement was more obvious, and the limiting oxygen index (LOI) of the composites increased from 22% to 28.5%, when ADP was added at 45 phr. The addition of ADP and ALHP reduced the rebound and increased hardness of the composites. The two flame‐retardants reduced the tensile strength, tensile elongation, and tear strength of the composites; both flame‐retardants adversely affect abrasion resistance, with abrasion loss of composite increased by 100% and 85% at 45 phr of ADP and ALHP, respectively. ADP can considerably improve LOI of the composites compared with ALHP, but it has a more significant negative impact on abrasion resistance.

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Study on flame retardant and smoke suppression of EPDM by sepiolite expansion flame retardant system

Li,

Dong,

Jia

et al. 2024

J of Applied Polymer Sci

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A large amount of smoke will be produced during the combustion of ethylene propylene diene monomer(EPDM), which seriously endangers the environment and personal safety. In this study, K‐SEP was obtained by modifying sepiolite with KH550, and two bio‐based flame retardant and smoke suppression systems AEGS and PEGS were prepared by combining ammonium polyphosphate intumescent flame retardant system (AEG) and piperazine pyrophosphate intumescent flame retardant system (PEG), respectively. The flame retardant and smoke suppression properties of AEGS and PEGS on EPDM matrix composites were investigated. The experimental results show that the LOI values of EPDM/AEGS3 and EPDM/PEGS3 composites with 3 phr K‐SEP are 8.1% and 5.5% higher than those of the blank samples without sepiolite. TSP decreased by 26.3% and 14.3% respectively, which proved that sepiolite has important research value in the field of flame retardant and smoke suppression of polymer materials.

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Flame-retardant effect of tannic acid-based intumescent fire-retardant applied on flammable natural rubber

Abstract: The ACT systems give synergistic effects on the flame retardancy and smoke suppression properties of NR.

Cited by 10 publications

References 38 publications

The Study of Enteromorpha-Based Reinforcing-Type Flame Retardant on Flame Retardancy and Smoke Suppression of EPDM

The Study of Enteromorpha-Based Reinforcing-Type Flame Retardant on Flame Retardancy and Smoke Suppression of EPDM

Effect of aluminum diethylphosphinate/aluminum hypophosphite on the high abrasion and flame resistance of NR/BR composites

Study on flame retardant and smoke suppression of EPDM by sepiolite expansion flame retardant system

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