Citation: Siyi Xu, Yue Han, Cheng Zhou, Jianxi Li, Liguo Shen, Hongjun Lin. A biobased flame retardant towards improvement of flame retardancy and mechanical property of ethylene vinyl acetate[J]. Chinese Chemical Letters, ;2023, 34(1): 107202. doi: 10.1016/j.cclet.2022.02.008 shu

A biobased flame retardant towards improvement of flame retardancy and mechanical property of ethylene vinyl acetate

Siyi Xu ^{a, b, c} ,
Yue Han ^{a, b, c} ,
Cheng Zhou ^{b, c} ,
Jianxi Li ^{b, c} ,
Liguo Shen ^{a, *,} ,
Hongjun Lin ^{a, *,}

a.
College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
b.
National Energy Life Evaluation and Management Technology Lab of Nuclear Power and Nonmetal Materials, Suzhou 215400, China
c.
CGN-DELTA (Taicang) Testing Technology Co., Ltd., Suzhou 215400, China

lgshen@zjnu.cn

hjlin@zjnu.cn

Received Date: 26 November 2021
Revised Date: 30 December 2021
Accepted Date: 3 February 2022
Available Online: 6 February 2022

Figures(4)

A new biobased flame retardant (MHPA) with remarkable compatibility was synthesized via a facile and low-cost neutralization reaction of magnesium hydroxide (MH) and phytic acid (PA). By blending the prepared MHPA into ethylene vinyl acetate (EVA), the fire retardancy, smoke suppression and mechanical properties of the composites were significantly improved. When 50 wt% of MH was added into EVA matrix, the value of limiting oxygen index (LOI) reached 26.1%. Whereas, when 10 wt% MH in the EVA composites (with initial 50 wt% MH) was replaced by MHPA, the resulted EVA composites had a LOI value of 30.8%, indicating high efficiency of addition of MHPA to improve flame retardancy. Moreover, the heat release rate (HRR) and total smoke production (TSP) of the EVA composites reduced by 54.4% and 27.6%, respectively, suggesting that incorporation of MHPA could effectively hinder rapid degradation of EVA composites during burning process. The fire-retardant mechanism may reside in that the MHPA combined with MH can present the excellent carbonization and expansion effects. This study illustrates that the biobased MHPA has a broad application prospect to develop flame-retardant EVA composites.
- Flame retardant,
- Smoke suppression,
- Mechanical properties,
- Magnesium hydroxide,
- Phytic acid
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