Repair effects of offcut-carbon-fiber-powder-modified PU-PMMA copolymer on flexure-after-impact behaviors of composite laminate.

IF 3.6 3区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Heliyon Pub Date : 2024-12-31 eCollection Date: 2025-01-15 DOI:10.1016/j.heliyon.2024.e41476

Shang-Nan Tsai, Hsin-Ting Chiang

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Abstract

Polymer matrix composites are popular for their lightweight and high strength. Poly (methyl methacrylate) (PMMA), known for its transparency, can be toughened with polyurethane (PU) to expand its applications. This study further strengthened PU-PMMA by adding carbon fiber powder from offcut fabrics (oCFP), enhancing mechanical and adhesion properties. Tensile, flexural, and lap-shear tests were conducted to investigate the effects of the oCFP on the mechanical and adhesion properties of the PU-PMMA resin. The oCFP-modified PU-PMMA was then used in scarf repair to assess its effectiveness on the impacted composite laminates. Tensile and flexural tests showed that 1 wt% oCFP improved tensile strength from 38 MPa to 43.31 MPa and flexural strength from 56.02 MPa to 82.21 MPa, while further addition of oCFP led to reductions in these strengths. Although oCFP-modified PU-PMMA did not significantly restore the impacted laminates' flexural strength, the repairing effect was still more pronounced than that of a commercial epoxy adhesive, demonstrating potential as a repair or structural adhesive.

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碳纤维粉末改性PU-PMMA共聚物对复合材料层合板冲击后挠曲性能的修复作用。

聚合物基复合材料以其轻量化和高强度而广受欢迎。聚甲基丙烯酸甲酯（PMMA）以其透明度而闻名，可与聚氨酯（PU）增韧以扩大其应用范围。本研究通过添加边角料碳纤维粉（oCFP）进一步强化PU-PMMA，提高其机械性能和粘接性能。进行了拉伸、弯曲和剪切试验，以研究oCFP对PU-PMMA树脂的机械性能和粘附性能的影响。然后将ocfp修饰的PU-PMMA用于围巾修复，以评估其对受冲击的复合材料层压板的有效性。拉伸和弯曲试验表明，1 wt%的oCFP可将拉伸强度从38 MPa提高到43.31 MPa，将弯曲强度从56.02 MPa提高到82.21 MPa，而进一步添加oCFP会导致这些强度降低。虽然ocfp改性PU-PMMA不能显著恢复受冲击层压板的抗弯强度，但修复效果仍然比商用环氧胶粘剂更明显，显示出作为修复或结构胶粘剂的潜力。

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来源期刊

Heliyon MULTIDISCIPLINARY SCIENCES-

CiteScore

4.50

自引率

2.50%

发文量

2793

期刊介绍： Heliyon is an all-science, open access journal that is part of the Cell Press family. Any paper reporting scientifically accurate and valuable research, which adheres to accepted ethical and scientific publishing standards, will be considered for publication. Our growing team of dedicated section editors, along with our in-house team, handle your paper and manage the publication process end-to-end, giving your research the editorial support it deserves.