Polymerization behaviors and properties of benzoxazine resins based-on meta-substituted anilines

IF 3.1 2区化学 Q2 CHEMISTRY, ANALYTICAL

Thermochimica Acta Pub Date : 2024-04-06 DOI:10.1016/j.tca.2024.179743

Shitong Ren , Fangjing Tian , Fengjuan Xiao , Zheng Peng , Yonggang Du

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Abstract

The molecular structure of benzoxazine is closely related to its polymerization activity and the properties of its polymer. In this work, benzoxazines were successfully synthesized from phenol, paraformaldehyde and meta-substituted anilines. Their polymerization behaviors were discussed by non-isothermal differential scanning calorimetry (DSC). Moreover, the thermal properties of corresponding polybenzoxazines were evaluated using DSC and thermogravimetric analysis. The results showed that the electron-withdrawing substituent increased the polymerization temperature while the electron-donating substituent lowered the polymerization temperature. The glass transition temperature decreased for polybenzoxazine with electron-donating substituent but elevated for polybenzoxazine with electron-withdrawing substituent. Besides, the thermal stability and thermal degradation mechanism of polybenzoxazine were significantly affected by the substituent. This work supplied further insight in the structure-property relationship of benzoxazine resin.

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基于元取代苯胺的苯并恶嗪树脂的聚合行为和特性

苯并恶嗪的分子结构与其聚合活性和聚合物的特性密切相关。在这项研究中，我们成功地用苯酚、多聚甲醛和元代苯胺合成了苯并恶嗪。通过非等温差示扫描量热法（DSC）讨论了它们的聚合行为。此外，还利用 DSC 和热重分析评估了相应聚苯并恶嗪的热特性。结果表明，抽电子取代基提高了聚合温度，而给电子取代基则降低了聚合温度。具有给电子取代基的聚苯并恶嗪的玻璃化温度降低，而具有抽电子取代基的聚苯并恶嗪的玻璃化温度升高。此外，取代基对聚苯并恶嗪的热稳定性和热降解机理也有显著影响。这项研究进一步揭示了苯并恶嗪树脂的结构-性能关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thermochimica Acta 化学-分析化学

CiteScore

6.50

自引率

8.60%

发文量

210

审稿时长

40 days

期刊介绍： Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application. The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta. The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas: - New and improved instrumentation and methods - Thermal properties and behavior of materials - Kinetics of thermally stimulated processes