Thermal aging and pyrolysis behavior of hyperbranched polymers grafted carbon fibers reinforced phthalonitrile/cyanate ester blend composites

doi:10.1016/j.cjche.2024.12.017

中国化学工程学报 ›› 2025, Vol. 81 ›› Issue (5): 161-170.DOI: 10.1016/j.cjche.2024.12.017

Thermal aging and pyrolysis behavior of hyperbranched polymers grafted carbon fibers reinforced phthalonitrile/cyanate ester blend composites

Abbas Daham¹, Abdeldjalil Zegaoui¹, Athar Ali Khan Gorar¹, Zhicheng Wang¹, Jun Wang¹, Zhiyi Guo¹, Zhongcheng Pan¹, Wenbin Liu¹, Mehdi Derradji²

1. College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;
2. UER Procédés Energétiques, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, Algiers Algeria

收稿日期:2024-08-19 修回日期:2024-12-17 接受日期:2024-12-23 出版日期:2025-05-28 发布日期:2025-03-08
通讯作者: Jun Wang,E-mail:wj6267@hrbeu.edu.cn;Zhongcheng Pan,E-mail:421336390@herbeu.edu.cn;Wenbin Liu,E-mail:wjlwb@163.com
基金资助:
This study was funded by the Innovative Research Group project of the National Natural Science Foundation of China (52373003).

Thermal aging and pyrolysis behavior of hyperbranched polymers grafted carbon fibers reinforced phthalonitrile/cyanate ester blend composites

Abbas Daham¹, Abdeldjalil Zegaoui¹, Athar Ali Khan Gorar¹, Zhicheng Wang¹, Jun Wang¹, Zhiyi Guo¹, Zhongcheng Pan¹, Wenbin Liu¹, Mehdi Derradji²

1. College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;
2. UER Procédés Energétiques, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, Algiers Algeria

Received:2024-08-19 Revised:2024-12-17 Accepted:2024-12-23 Online:2025-05-28 Published:2025-03-08
Contact: Jun Wang,E-mail:wj6267@hrbeu.edu.cn;Zhongcheng Pan,E-mail:421336390@herbeu.edu.cn;Wenbin Liu,E-mail:wjlwb@163.com
Supported by:
This study was funded by the Innovative Research Group project of the National Natural Science Foundation of China (52373003).

摘要/Abstract

摘要： This study investigates the long-term thermal-oxidative stability and mechanical properties of phenol-containing phthalonitrile monomer (PN75) and dicyanate ester of bisphenol-A (DCBA) composites reinforced with short carbon fibers T700SC (SCF) within a temperature range of 330-375 °C. The research focuses on the PN75 monomer and DCBA blend reinforced SCF composites with varying SCF content, examining mass loss and changes in flexural strength after thermal aging for 50 h (h). Results show that the SCF-reinforced composites based on the PN75/DCBA blend consistently outperform the neat blend in flexural strength, both at room temperature and after thermal aging. The introduction of the SCF significantly improves the composites' thermal stability and mechanical retention, with higher SCF content correlating to better performance. Notably, after aging at 350 °C, the SCF-reinforced composites based (30% (mass) SCF) retained 88.8% of its flexural strength, compared to 61.1% for the neat blend. Morphological analysis reveals that while thermal aging causes degradation of the PN75/DCBA blend layer on SCF surfaces, the overall composite structure maintains good mechanical properties up to 350 °C. At 375 °C, significant degradation occurs, yet the composites still retain flexural strengths above 78 MPa. This study demonstrates the potential of the SCF-reinforced composites based on PN75/DCBA blend for high-temperature applications, establishing their upper-temperature limit for long-term use in oxidative environments.

关键词: Phenol-containing phthalonitrile monomer, Mechanical properties, Thermal oxidative aging, Carbon fibers

Abstract: This study investigates the long-term thermal-oxidative stability and mechanical properties of phenol-containing phthalonitrile monomer (PN75) and dicyanate ester of bisphenol-A (DCBA) composites reinforced with short carbon fibers T700SC (SCF) within a temperature range of 330-375 °C. The research focuses on the PN75 monomer and DCBA blend reinforced SCF composites with varying SCF content, examining mass loss and changes in flexural strength after thermal aging for 50 h (h). Results show that the SCF-reinforced composites based on the PN75/DCBA blend consistently outperform the neat blend in flexural strength, both at room temperature and after thermal aging. The introduction of the SCF significantly improves the composites' thermal stability and mechanical retention, with higher SCF content correlating to better performance. Notably, after aging at 350 °C, the SCF-reinforced composites based (30% (mass) SCF) retained 88.8% of its flexural strength, compared to 61.1% for the neat blend. Morphological analysis reveals that while thermal aging causes degradation of the PN75/DCBA blend layer on SCF surfaces, the overall composite structure maintains good mechanical properties up to 350 °C. At 375 °C, significant degradation occurs, yet the composites still retain flexural strengths above 78 MPa. This study demonstrates the potential of the SCF-reinforced composites based on PN75/DCBA blend for high-temperature applications, establishing their upper-temperature limit for long-term use in oxidative environments.

Key words: Phenol-containing phthalonitrile monomer, Mechanical properties, Thermal oxidative aging, Carbon fibers

Abbas Daham, Abdeldjalil Zegaoui, Athar Ali Khan Gorar, Zhicheng Wang, Jun Wang, Zhiyi Guo, Zhongcheng Pan, Wenbin Liu, Mehdi Derradji. Thermal aging and pyrolysis behavior of hyperbranched polymers grafted carbon fibers reinforced phthalonitrile/cyanate ester blend composites[J]. 中国化学工程学报, 2025, 81(5): 161-170.

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Thermal aging and pyrolysis behavior of hyperbranched polymers grafted carbon fibers reinforced phthalonitrile/cyanate ester blend composites

Thermal aging and pyrolysis behavior of hyperbranched polymers grafted carbon fibers reinforced phthalonitrile/cyanate ester blend composites

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