Latent heat absorption of alkali metal hydrates enables delayed ignition and improved flame retardancy of epoxy resin

被引：3

作者：

Feng, Jiao ^{[1
]}

Lin, Peng ^{[1
]}

Xiang, Simeng ^{[1
]}

Lin, Xiang ^{[1
]}

Liu, Feng ^{[1
]}

Yang, Hongyu ^{[1
]}

Feng, Xiaming ^{[1
]}

Wan, Chaojun ^{[1
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, 174 Shazhengjie, Chongqing 400044, Peoples R China

来源：

THERMOCHIMICA ACTA | 2024年 / 740卷

关键词：

Alkali metal hydrates; Phase change heat absorption; Flame retardancy; Epoxy resin; Delayed ignition;

D O I：

10.1016/j.tca.2024.179830

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this work, alkali metal hydrates, barium hydroxide octahydrate (BHO) and sodium acetate trihydrate (SAT) were added into epoxy resin (EP) to prepare a series of flame-retardant EP composites. It showed that EP samples can pass the V-0 rating of UL-94 when the amount of hydrated salt exceeds 45 wt%. When the additional amount of SAT is 50 wt%, the LOI of the EP sample increases to as high as 39% compared to 19% of pure EP. In addition, the time to ignition (TTI) of EP with 50 wt% SAT was prolonged to 157 s from 63 s of pure EP, which can provide valuable time for fire escape. The peak heat release rate (PHRR) was reduced by 63.9% compared with that of pure EP (from 1392.4 kW/m2 to 502.18 kW/m2), which indicated that phase change heat absorption plays a crucial role in reducing fire hazards of EP.

引用

页数：9

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