期刊
POLYMER DEGRADATION AND STABILITY
卷 196, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2022.109841
关键词
Phytic acid; DOPO; biobased intumescent flame retardant; epoxy resin; synergistic effect
资金
- State Key Laboratory of Explosion Science and Technology [YBKT21-07]
- National Natural Science Foundation of China [11772059, cx2021073]
A biobased intumescent flame retardant (PAD) with different oxidation state of phosphorus is synthesized successfully via combining phytic acid (PA) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). The combination of PAD and a borate (DOT) shows excellent synergistic effect and improves the flame retardancy of epoxy resin.
A biobased intumescent flame retardant (PAD) with different oxidation state of phosphorus was synthesized successfully via combining phytic acid (PA) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). The chemical structure and performance of PAD were characterized by FTIR, H-1 NMR, P-31 NMR, and TGA, respectively. After introducing 5wt% PAD into epoxy resin, the EP samples exhibited expansive behavior during combustion and left char residue with 14.4% mass and 2.4 cm height. Meanwhile, the combination of 5wt% mixture of PAD and a borate (DOT) demonstrated good synergistic effect and further improved the flame retardancy of EP sample, as reflected by increased LOI value of 29%, V-0 rating in UL-94 test and char residue of 15.4%. Compared with neat EP sample, the PHRR and FIGRA reduced by 42.8% and 42%, respectively. Moreover, the initial decomposition temperature (T-5wt%) also increased to 350 degrees C. Finally, SEM/EDS, Raman, TG-IR, and Py-GC/MS were employed to evaluate the flame-retardant mechanism. This novel intumescent flame retardant PAD functioned in both condensed and gas phases, and the synergistic effect of PAD and DOT brings out excellent flame retardancy for epoxy. (C) 2022 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据