Development of a flame-retardant epoxy resin with high glass transition temperature and transparency based on a diphenylphosphine oxide derivative

IF 4.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

Frontiers of Chemical Science and Engineering Pub Date : 2025-07-01 DOI:10.1007/s11705-025-2575-9

Luyu Zheng, Mei Wu, Dayu Sun, Wei Zhao, Qingzhong Xue, Liang Song, Qing Yu, Haodong Duan, Hui Yang, Zhongwei Wang

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引用次数: 0

Abstract

To obtain high-performance flame-retardant epoxy resin (EP), diglycidyl ether of (2,5-dihydroxyphenyl) diphenyl phosphine oxide (DPO-HQ-EP) was synthesized. EP/DPO-HQ-EP samples with varying phosphorus contents were prepared by curing a mixture of DPO-HQ-EP and diglycidyl ether of bisphenol A. The incorporation of DPO-HQ-EP significantly enhanced the flame retardancy of EP without compromising its glass transition temperature. The EP/DPO-HQ-EP/0.6 exhibited a limited oxygen index of 31.7% and achieved a V-0 rating in the vertical burning test. In the cone calorimeter test, due to the incorporation of DPO-HQ-EP, the peak of heat release rate and total heat release of EP/DPO-HQ-EP/0.6 decreased by 39.4% and 15.9% compared with the values for pure EP. A detailed investigation of the flame-retardant mechanism revealed that the improved flame retardancy of EP/DPO-HQ-EP samples was attributed to the release of phosphorus-containing free radicals and non-flammable gases in the gas phase, as well as the formation of a continuous and dense char layer in the condensed phase. Moreover, the dielectric constant and dielectric loss factor of EP/DPO-HQ-EP samples were lower than those of EP/0. The water absorptivity and transparency of EP were effectively preserved with the incorporation of DPO-HQ-EP. These findings highlighted the potential of EP/DPO-HQ-EP for industrial applications in an electrical field.

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基于二苯基氧化膦衍生物的高玻璃化温度和高透明度阻燃环氧树脂的研制

为制备高性能阻燃环氧树脂（EP），合成了（2,5-二羟基苯基）二苯基氧化膦二缩水甘油酯（DPO-HQ-EP）。将DPO-HQ-EP与双酚a二甘油酯混合固化，制备了不同磷含量的EP/DPO-HQ-EP样品。DPO-HQ-EP的加入在不影响EP玻璃化转变温度的情况下，显著提高了EP的阻燃性。EP/DPO-HQ-EP/0.6的极限氧指数为31.7%，在垂直燃烧试验中达到V-0等级。在锥形量热计测试中，由于加入了DPO-HQ-EP， EP/DPO-HQ-EP/0.6的放热率峰值和总放热量比纯EP降低了39.4%和15.9%。详细的阻燃机理研究表明，EP/DPO-HQ-EP样品的阻燃性能的提高是由于气相中含磷自由基和不可燃气体的释放，以及在凝聚相中形成连续致密的炭层。EP/DPO-HQ-EP样品的介电常数和介电损耗因子均低于EP/0样品。DPO-HQ-EP的掺入有效地保持了EP的吸水率和透明度。这些发现突出了EP/DPO-HQ-EP在电气领域的工业应用潜力。

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来源期刊

Frontiers of Chemical Science and Engineering ENGINEERING, CHEMICAL-

CiteScore

7.60

自引率

6.70%

发文量

868

审稿时长

1 months

期刊介绍： Frontiers of Chemical Science and Engineering presents the latest developments in chemical science and engineering, emphasizing emerging and multidisciplinary fields and international trends in research and development. The journal promotes communication and exchange between scientists all over the world. The contents include original reviews, research papers and short communications. Coverage includes catalysis and reaction engineering, clean energy, functional material, nanotechnology and nanoscience, biomaterials and biotechnology, particle technology and multiphase processing, separation science and technology, sustainable technologies and green processing.