This study aimed to synthesize and characterize non-woven acrylonitrile butadiene styrene (ABS), polyamide-6 (P6), and polystyrene (PS) nanofibers, and evaluate their effects on the flexural strength and fracture resistance of fiber-modified polymethyl methacrylate (PMMA) resin. ABS, P6, and PS polymer solutions were prepared and electrospun into fiber mats, which were characterized by means of morphological, chemical, physical, and mechanical analyses. The fiber mats were then used to modify a thermally-activated PMMA resin, resulting in four testing groups: one unmodified group (control) and three fiber-modified groups incorporated with ABS, P6, or PS fiber mats. Flexural strength, work of fracture, and fractographic analysis were performed for all groups. Data were analyzed using Kruskal-Wallis or ANOVA tests (α = 0.05). The fiber diameter decreased, respectively, as follows: ABS > P6 > PS. Only the P6 fiber mats demonstrated a crystalline structure. Wettability was similar among the distinct fiber mats, although tensile strength was significantly greater for P6, followed by ABS, and then PS mats. Flexural strength of the fiber-modified PMMA resins was similar to the control, except for the weaker P6-based material. The work of fracture seemed to be greater and lower when the P6 and PS fibers were used, respectively. The fiber-modified groups exhibited a rougher pattern in the fractured surfaces when compared to the control, which may suggest that the presence of fibers deviates the direction of crack propagation, making the fracture mechanism of the PMMA resin more dynamic. While the neat PMMA showed a typical brittle response, the fiber-modified PMMA resins demonstrated a ductile response, combined with voids, suggesting large shear deformation during fracture. Altogether, despite the lack of direct reinforcement in the mechanical strength of the PMMA resin, the use of electrospun fibers showed promising application for the improvement of fracture behavior of PMMA resins, turning them into more compliant materials, although this effect may depend on the fiber composition.

这项研究旨在合成和表征无纺布丙烯腈丁二烯苯乙烯（ABS），聚酰胺6（P6）和聚苯乙烯（PS）纳米纤维，并评估它们对纤维改性的聚甲基丙烯酸甲酯（PMMA）的抗弯强度和抗断裂性的影响）树脂。制备了ABS，P6和PS聚合物溶液，并将其静电纺制成纤维毡，并通过形态，化学，物理和机械分析对其进行了表征。然后将纤维毡用于改性热活化的PMMA树脂，形成四个测试组：一个未改性的组（对照组）和三个掺有ABS，P6或PS纤维毡的纤维改性的组。所有组均进行抗弯强度，断裂功和分形分析。使用Kruskal-Wallis或ANOVA检验分析数据（α= 0.05）。纤维直径分别减小如下：ABS> P6> PS。仅P6纤维垫显示出晶体结构。不同的纤维垫之间的润湿性相似，尽管P6，ABS和PS垫的拉伸强度明显更高。纤维改性的PMMA树脂的抗弯强度与对照类似，只是较弱的P6基材料除外。当分别使用P6和PS纤维时，断裂功似乎更大和更低。与对照相比，纤维改性基团在断裂表面上表现出更粗糙的图案，这可能表明纤维的存在会偏离裂纹扩展的方向，从而使PMMA树脂的断裂机理更加动态。整齐的PMMA表现出典型的脆性响应，纤维改性的PMMA树脂表现出韧性响应，并伴有空隙，表明断裂过程中剪切变形大。总体而言，尽管在PMMA树脂的机械强度方面缺乏直接的增强，但电纺纤维的使用显示出有望改善PMMA树脂断裂性能的应用，尽管它们的效果可能取决于纤维，但仍将其转变为更柔顺的材料。组成。