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<p>This study investigates the aging behavior of carbon-fiber-reinforced brominated bisphenol-A epoxy vinyl ester resin (CFBPA), a marine-grade composite material, through long-term natural exposure testing in Qingdao’s marine atmosphere. Using a comprehensive analytical approach incorporating Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, and tensile testing, we systematically characterized the evolution of the chemical, morphological, thermal, and mechanical properties of CFBPA under environmental stressors. The results demonstrated that UV radiation initiates significant resin matrix degradation, whereas prolonged exposure exacerbates carbon fiber deterioration, collectively impairing the mechanical performance of the composite. Microscopic analysis revealed that matrix delamination was predominantly initiated at the fiber–matrix interface. These findings provide critical insights for the development of enhanced environmental protection strategies for marine composite applications, particularly for optimizing interfacial bonding and UV-resistant formulations.</p>

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The Performance Degradation of Carbon-Fiber-Reinforced Vinyl Ester Composites Exposed to Marine Atmospheric Environment

  • 期刊论文

  • 发表日期：

    2025年9月19日

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  • Xiaohua Chen,
  • Kangkang Ding,
  • Kun Pang,
  • Cheng Man,
  • Zhongyu Cui

摘要

This study investigates the aging behavior of carbon-fiber-reinforced brominated bisphenol-A epoxy vinyl ester resin (CFBPA), a marine-grade composite material, through long-term natural exposure testing in Qingdao’s marine atmosphere. Using a comprehensive analytical approach incorporating Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, and tensile testing, we systematically characterized the evolution of the chemical, morphological, thermal, and mechanical properties of CFBPA under environmental stressors. The results demonstrated that UV radiation initiates significant resin matrix degradation, whereas prolonged exposure exacerbates carbon fiber deterioration, collectively impairing the mechanical performance of the composite. Microscopic analysis revealed that matrix delamination was predominantly initiated at the fiber–matrix interface. These findings provide critical insights for the development of enhanced environmental protection strategies for marine composite applications, particularly for optimizing interfacial bonding and UV-resistant formulations.