Herein, to enhance the toughness of resins and tensile strength of fiber-reinforced polymers (FRPs), multi-wall carbon nanotubes (MWCNTs) were incorporated as a toughening material into resin matrices. The effects of the MWCNT addition on the fracture toughness (K_IC) and mechanical properties of epoxy and vinyl ester resins, and the tensile strength (σ_r) and stiffness of impregnated basalt, carbon, and glass fiber rovings were systematically examined. The enhancement mechanism was studied by scanning electron microscopy (SEM). The enhancement in the tensile strength of the FRPs was predicted. The results showed that as compared to pure epoxy resin, the 0.3 wt% MWCNT-modified epoxy resin exhibited elevated K_IC, tensile strength (σ_t), flexural strength (σ_f), and impact strength (α_cU). Similar improvements were discovered for the MWCNT-modified vinyl ester resins. Concentrated tortuous textures due to the bonding and bridging effects of MWCNTs were observed on the fracture surface by SEM. The σ_r of the basalt, carbon, and glass rovings obviously increased with the addition of MWCNTs, owing to the combined action of restricted crack propagation and the promoted co-stress of fibers. Additionally, the σ_r of MWCNT-modified basalt and carbon rovings exhibited a lower dispersion, resulting in a higher guaranteed strength. The modification method proposed above can effectively improve the mechanical properties and design strength of FRP.

在本文中，为了增强树脂的韧性和纤维增强聚合物（FRP）的拉伸强度，将多壁碳纳米管（MWCNT）作为增韧材料掺入到树脂基体中。的MWCNT加入量对断裂韧性（的效果ķ _IC）和环氧树脂和乙烯酯树脂的机械性能，拉伸强度（σ _{- [R}进行了系统的研究）和浸渍玄武岩，碳和玻璃纤维粗纱的刚度。通过扫描电子显微镜（SEM）研究了增强机理。可以预测FRP的拉伸强度会提高。结果表明，与纯环氧树脂相比，0.3 wt％MWCNT改性的环氧树脂的K _IC升高。，拉伸强度（σ_吨），弯曲强度（σ _˚F）和冲击强度（α _CU）。对于MWCNT改性的乙烯基酯树脂，发现了类似的改进。通过扫描电镜观察到了由于碳纳米管的键合和桥连作用导致的集中曲折质地。所述σ _ř玄武岩，碳和玻璃纤维粗纱中，并添加多壁碳纳米管的明显增加，由于受限制裂纹传播的联合作用和纤维的促进共应力。此外，该σ _řMWCNT改性的玄武岩和碳粗纱的分散度较低，因此保证强度较高。以上提出的改性方法可以有效提高玻璃钢的力学性能和设计强度。