P/N/Si-containing synergistic flame retardants endowing lignin-based epoxy resin with good flame retardancy, mechanical properties and heat resistance

IF 2.9 4区 化学 Q2 POLYMER SCIENCE
Jialan Li, Jinlei Wang, Huimin Zheng, Jianwei Guo, Ruijie Guo, Hong Yan
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Abstract

Biobased epoxy resins are gaining attention as a renewable alternative to petroleum-based resins. However, their inherent flammability requires flame-retardant treatment. In this study, hexaphenoxycyclotriphosphazene (HPCP) and various synergists were utilized to improve the flame retardancy of lignin-based epoxy resin (EP-L). Results showed that (3-aminopropyl)triethoxysilane (APTES) had the most effective synergistic effect for HPCP to form a P/N/Si-containing system, resulting in a compact crosslinked char layer. Upon the incorporation of HPCP and APTES (6∶1, 12 wt% of EP mass) into EP, a V-0 classification was achieved in the UL-94 vertical burning assessment, with a limiting oxygen index of 33.6% and a 47.77% decrease in the peak of heat release rate. This system minimally influenced the tensile strength of the composite (a 16.51% reduction), and maximumly increased its initial degradation temperature by 83 °C, compared with EP-L. © 2023 Society of Industrial Chemistry.

Abstract Image

Abstract Image

含P/N/ si的协同阻燃剂使木质素基环氧树脂具有良好的阻燃性、机械性能和耐热性
生物基环氧树脂作为石油基树脂的可再生替代品,正受到越来越多的关注。然而,其固有的可燃性需要阻燃处理。本研究利用六苯氧环三磷腈(HPCP)和多种增效剂来改善木质素基环氧树脂(EP-L)的阻燃性。结果表明,(3-氨基丙基)三乙氧基硅烷(APTES)对HPCP具有最有效的协同作用,可形成P/N/ si的体系,形成致密的交联炭层。在EP中加入HPCP和APTES (EP质量的6∶1,12 wt%)后,UL-94垂直燃烧评价达到V-0级,极限氧指数为33.6%,放热率峰值降低47.77%。与EP-L相比,该体系对复合材料抗拉强度的影响最小(降低了16.51%),最大限度地提高了复合材料的初始降解温度83℃。©2023工业化学学会。
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来源期刊
Polymer International
Polymer International 化学-高分子科学
CiteScore
7.10
自引率
3.10%
发文量
135
审稿时长
4.3 months
期刊介绍: Polymer International (PI) publishes the most significant advances in macromolecular science and technology. PI especially welcomes research papers that address applications that fall within the broad headings Energy and Electronics, Biomedical Studies, and Water, Environment and Sustainability. The Journal’s editors have identified these as the major challenges facing polymer scientists worldwide. The Journal also publishes invited Review, Mini-review and Perspective papers that address these challenges and others that may be of growing or future relevance to polymer scientists and engineers.
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