Synthesis of nitrile-containing ortho-amide benzoxazines for achieving thermosets with low curing temperature and superior performance,Polymer Chemistry

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Synthesis of nitrile-containing ortho-amide benzoxazines for achieving thermosets with low curing temperature and superior performance
Polymer Chemistry ( IF 4.1 ) Pub Date : 2024-09-03 , DOI: 10.1039/d4py00777h
Yin Lu ₁ , Jiaqi Wang ₁ , Yi Yang ₁ , Yichen Jing ₁ , Kan Zhang ₁

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In this work, a molecular design strategy by incorporating nitrile into ortho-amide benzoxazines was employed for achieving promising high performance thermsosets. We conducted a systematic investigation into the influence of additional nitrile moieties on the properties of ortho-amide benzoxazines. Initially, structural characterization of benzoxazines was performed using NMR and FT-IR spectroscopy, followed by DSC analysis and in situ FT-IR spectroscopy to study the polymerization mechanisms of each benzoxazine monomer. Notably, the thermoset derived from ortho-amide benzoxazine bearing two nitrile groups exhibited exceptional thermal stability (T_d5 of 392.5 °C) and high glass transition temperature (T_g of 331 °C), alongside preferable flame retardancy (THR = 3.9 kJ g⁻¹).This approach resulted in a new series of thermosetting resins with low curing temperature and improved comprehensive properties, thereby offering significant potential for the development of advanced thermoset materials with a wide range of intelligent applications.

中文翻译：

含腈邻酰胺苯并恶嗪的合成用于获得低固化温度和优异性能的热固性材料

在这项工作中，采用将腈掺入邻酰胺苯并恶嗪的分子设计策略来实现有前景的高性能热固性材料。我们对额外的腈部分对邻酰胺苯并恶嗪性质的影响进行了系统研究。最初，使用 NMR 和 FT-IR 光谱对苯并恶嗪进行结构表征，然后通过 DSC 分析和原位FT-IR 光谱研究每种苯并恶嗪单体的聚合机理。值得注意的是，源自带有两个腈基的邻酰胺苯并恶嗪的热固性材料表现出优异的热稳定性（ T _d5为 392.5 °C）和高玻璃化转变温度（ T _g为 331 °C），同时具有较好的阻燃性（THR = 3.9 kJ g） ⁻¹ ).这种方法产生了一系列新的热固性树脂，具有较低的固化温度和改进的综合性能，从而为开发具有广泛智能应用的先进热固性材料提供了巨大的潜力。

更新日期：2024-09-05

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