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<p>As a high-performance polymer, polyurea is widely used in the field of impact resistance due to its outstanding mechanical properties and energy-absorbing characteristics. However, the rapid reaction rate of polyurea formation poses challenges in designing polyurea systems that are both high in strength and easy to manufacture. By CNTs and utilizing sterically hindered chain extenders to slow down the reaction rate, polyurea-CNT composites were developed to enhance the mechanical performance of the coatings. The addition of CNTs significantly improved the tensile strength (by 37%) and tear resistance (by 28%) of the polyurea. Furthermore, the PUAC2 composite demonstrated exceptional impact resistance in gas explosion tests, effectively withstood high-pressure shocks, and protected the substrate from damage. This study provides valuable design insights for the development of high-performance polyurea coatings intended for impact protection applications.</p>

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Impact-resistant polyurea coating materials based on steric hindrance effect and carbon nanotube reinforcement strategy

  • 期刊论文

  • 发表日期：

    2025年9月17日

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  • Guofen Rui,
  • Yu Meng,
  • Jialin Liu,
  • Dong Wang

摘要

As a high-performance polymer, polyurea is widely used in the field of impact resistance due to its outstanding mechanical properties and energy-absorbing characteristics. However, the rapid reaction rate of polyurea formation poses challenges in designing polyurea systems that are both high in strength and easy to manufacture. By CNTs and utilizing sterically hindered chain extenders to slow down the reaction rate, polyurea-CNT composites were developed to enhance the mechanical performance of the coatings. The addition of CNTs significantly improved the tensile strength (by 37%) and tear resistance (by 28%) of the polyurea. Furthermore, the PUAC2 composite demonstrated exceptional impact resistance in gas explosion tests, effectively withstood high-pressure shocks, and protected the substrate from damage. This study provides valuable design insights for the development of high-performance polyurea coatings intended for impact protection applications.