Interfacial Bonding and Mechanical Properties of Aramid Fiber/Unsaturated Polyester Resin Composites Reinforced by Physically Anchoring-Chemically Bonding Gradient Interfaces 


Vol. 26,  No. 10, pp. 4527-4536, Oct.  2025
10.1007/s12221-025-01108-7


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  Abstract

Aramid fiber/unsaturated polyester resin (AF/UP) composites suffer from weak interfacial adhesion which limits their applications in demanding environment. This study proposes a synergistic modification strategy utilizing polydopamine (PDA) and -methacryloxypropyltrimethoxysilane (KH570) which constructs a dual-mechanism interface combining mechanical interlocking and covalent bonding. PDA layer was first formed on AF surface via dopamine (DA) oxidative self-polymerization. KH570 formed covalent bonds with PDA layer to yield KH570–PDA–AF. Multi-scale characterization revealed that PDA and KH570 were successfully grafted on AF surface. KH570–PDA–AF/UP composite achieved an interfacial strength of 35.03 MPa (a 57.4% enhancement) due to copolymerization between KH570 and UP. The tensile strength of KH570–PDA–AF/UP reached 1054.86 MPa (a 47.62% increase) and Young's modulus was 23.64 GPa (a 135.93% enhancement) compared to AF/ UP. Dynamic mechanical analysis showed reduced loss modulus above 76 °C which signified optimized interfacial energy dissipation mechanisms. These results manifest that PDA–KH570 synergistic modification strategy effectively optimizes interfacial bonding of AF/UP which offers a novel approach for designing high-performance fiber-reinforced composites with both theoretical innovation and engineering applicability.

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  Cite this article

[IEEE Style]

K. Chen, Y. Hu, Y. Zhang, Z. Jin, Q. Lei, Y. Li, Q. Zhou, Y. Wang, "Interfacial Bonding and Mechanical Properties of Aramid Fiber/Unsaturated Polyester Resin Composites Reinforced by Physically Anchoring-Chemically Bonding Gradient Interfaces," Fibers and Polymers, vol. 26, no. 10, pp. 4527-4536, 2025. DOI: 10.1007/s12221-025-01108-7.

[ACM Style]

Kexin Chen, Yinchun Hu, Yan Zhang, Zhibin Jin, Qi Lei, Yongcun Li, Qiong Zhou, and Yingying Wang. 2025. Interfacial Bonding and Mechanical Properties of Aramid Fiber/Unsaturated Polyester Resin Composites Reinforced by Physically Anchoring-Chemically Bonding Gradient Interfaces. Fibers and Polymers, 26, 10, (2025), 4527-4536. DOI: 10.1007/s12221-025-01108-7.

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pISSN : 1229 - 9197
eISSN : 1875 - 0052

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