含磷厚朴酚环氧单体的合成及其在双酚A环氧树脂上的阻燃改性

IF 2.8 4区 化学 Q3 POLYMER SCIENCE
Baolong Li, Mingyuan Wang, Keyu Wang, Bingbing Wei, Gui Xiang Hou
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引用次数: 0

摘要

为提高环氧树脂的阻燃性能和吸收生物质资源,以厚朴酚和9,10-二氢-9-氧-10-磷酸菲-10-氧化物(DOPO)为原料,通过两步反应合成了一种新型的含磷厚朴酚基环氧单体(MG-DO-EP)。然后将所得单体作为固有阻燃改性剂,在复合热固性体系中,以4,4 ' -二氨基二苯甲烷(DDM)为固化剂,与双酚a环氧树脂(E44)共固化。综合表征表明,MG-DO-EP的加入显著改善了材料的性能。与未改性的E44/DDM相比,mg - do - ep改性的复合材料表现出更高的热稳定性、阻燃性、抗弯强度和存储模量,但玻璃化转变温度和交联密度略有降低。当添加量为20 wt%时,复合树脂的抗弯强度提高了14.1%,存储模量提高了29.9%。700℃时的残碳率达到56.7%,是纯E44体系的3.57倍。峰值放热率(pHRR)和总放热率(THR)分别显著降低80.8%和69.4%。当载荷为10 wt%时,冲击强度提高了14.4%,达到4.75 kJ/m²。值得注意的是,即使在5 wt%的低负荷下,该复合材料在UL-94垂直燃烧测试中也达到了V-0等级,证明了一种涉及冷凝相和气相作用的协同阻燃机制。这些发现凸显了MG-DO-EP作为一种可持续和有效的环氧树脂阻燃改性剂的潜力,它具有平衡的机械性能和优异的耐火性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Synthesis of phosphorus containing magnolol epoxy monomer and its flame retardant modification on bisphenol A epoxy resin

Synthesis of phosphorus containing magnolol epoxy monomer and its flame retardant modification on bisphenol A epoxy resin

Synthesis of phosphorus containing magnolol epoxy monomer and its flame retardant modification on bisphenol A epoxy resin

To enhance the flame retardancy of epoxy resin and incorporate biomass resources, a novel phosphorus-containing magnolol-based epoxy monomer (MG-DO-EP) was synthesized through a two-step reaction using magnolol and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) as starting materials. The resulting monomer was then used as an intrinsic flame-retardant modifier in a composite thermosetting system, where it was co-cured with bisphenol A epoxy resin (E44) using 4,4’-diaminodiphenylmethane (DDM) as the curing agent. Comprehensive characterization revealed that the incorporation of MG-DO-EP significantly improved the material’s performance. Compared with unmodified E44/DDM, the MG-DO-EP-modified composites exhibited enhanced thermal stability, flame retardancy, flexural strength, and storage modulus, though with a slight reduction in glass transition temperature and crosslinking density. At a dosage of 20 wt%, the bending strength of the composite resin increased by 14.1%, while the storage modulus increased by 29.9%. The carbon residue at 700 ° C reached 56.7%, which is 3.57 times higher than that of the pure E44 system. Additionally, the peak heat release rate (pHRR) and total heat release (THR) decreased dramatically by 80.8% and 69.4%, respectively. At 10 wt% loading, the impact strength improved by 14.4% to 4.75 kJ/m². Notably, even at a low loading of 5 wt%, the composite achieved a V-0 rating in the UL-94 vertical burning test, demonstrating a synergistic flame-retardant mechanism involving both condensed-phase and gas-phase actions. These findings highlight the potential of MG-DO-EP as a sustainable and effective flame-retardant modifier for epoxy resins, offering balanced mechanical properties and superior fire resistance.

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来源期刊
Journal of Polymer Research
Journal of Polymer Research 化学-高分子科学
CiteScore
4.70
自引率
7.10%
发文量
472
审稿时长
3.6 months
期刊介绍: Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.
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