高耐热阻燃的自催化生物基苯并恶嗪-邻苯二腈热固性材料

IF 7.4 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2025-08-17 DOI:10.1016/j.polymdegradstab.2025.111612

Ailin Peng , Zhenlei Wang , Ziqiu Zeng , Wendong Chen , Xiaobo Liu , Yumin Huang

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引用次数: 0

摘要

开发具有优异耐热性和阻燃性的可持续生物基热固性树脂仍然是一个关键的挑战。本研究合成了一种新型愈创木酚衍生的苯并恶嗪类邻苯二腈树脂（GB-PN），并制备了聚合物Poly（GB-PN）。对其固化性能、聚合机理和阻燃机理进行了系统的研究。通过固化动力学参数确定了最佳固化温度。Poly(GB-PN)-360°C表现出良好的热稳定性，Td5和Td10分别为461°C和507°C，炭渣产率（Yc）高达66.2%。此外，Poly(GB-PN)-360°C的阻燃性能明显优于类似的热固性树脂，其极限氧指数（LOI）为43.98%，放热能力（HRC）为15.5 J/(g·K)，总放热能力（THR）为1.4 kJ/g。通过x射线光电子能谱（XPS）、扫描电镜（SEM）、拉曼光谱（Raman）和热解-气相色谱/质谱（Py-GC/MS）表征，证实了Poly(GB-PN)-360°C的残余焦机制，并阐明了其热解途径和焦层组成。这项工作为开发热固性树脂提供了有效的策略和理论见解，这些树脂具有优异的耐热性和阻燃性。

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Self-catalytic bio-based benzoxazine-phthalonitrile thermosets with high heat resistance and flame retardancy

Developing sustainable bio-based thermoset resins with exceptional heat resistance and flame retardancy remains a critical challenge. This study synthesized a novel guaiacol-derived benzoxazine-containing phthalonitrile resin (GB-PN) and prepared its polymer Poly(GB-PN). The curing behavior, polymerization mechanism, and flame-retardant mechanism were systematically investigated. The optimal curing temperature was determined via curing kinetic parameters. Poly(GB-PN)-360 °C exhibited outstanding thermal stability, with T_d5 and T_d10 values of 461 °C and 507 °C, respectively, and a high char residue yield (Y_c) of 66.2 %. Moreover, Poly(GB-PN)-360 °C exhibited significantly superior flame retardancy compared to analogous thermosetting resins, evidenced by a limiting oxygen index (LOI) of 43.98 %, a heat release capacity (HRC) of 15.5 J/(g·K), and a total heat release (THR) of 1.4 kJ/g. Characterization by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), Raman spectroscopy, and Pyrolysis-Gas Chromatography/Mass Spectrometry (Py-GC/MS) confirmed the residual char mechanism of Poly(GB-PN)-360 °C and elucidated its pyrolysis pathways and char layer composition. This work provides an effective strategy and theoretical insights into char formation for developing thermosetting resins that integrate superior thermal resistance and flame-retardant properties.

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.