Commercial γ − Al 2 O 3 particles, Al 2 O 3 n, and synthesized Al 2 O 3 doped with iron oxide (Al 2 O 3 Fe) were used as reinforcements to enhance the toughness of an unsaturated polyester resin (UPR). Alumina modification with vinyl, Al 2 O 3 (n, Fe)–VT, and methacryloyl, Al 2 O 3 (n, Fe)–ME functionalities contributed to the increase in the extent of covalent binding at the UPR/filler interface. Tensile tests showed a slight improvement in the toughness of UPR/Al 2 O 3 Fe composite and a significant improvement for the UPR/Al 2 O 3 Fe–VT composite at a 1.0 wt.% particle loading. An enhancement in the micro Vickers hardness for UPR/Al 2 O 3 Fe–VT and improved DMA properties were also evidenced.

中文翻译：

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结构和表面改性的氧化铝颗粒作为聚酯基复合材料的增强剂，具有更高的韧性

商用γ - Al 2 O 3 颗粒、Al 2 O 3 n 和掺杂氧化铁（Al 2 O 3 Fe）的合成Al 2 O 3 被用作增强剂以提高不饱和聚酯树脂（UPR）的韧性。用乙烯基、Al 2 O 3 (n, Fe)-VT 和甲基丙烯酰基、Al 2 O 3 (n, Fe)-ME 官能团对氧化铝进行改性有助于增加 UPR/填料界面处的共价结合程度。拉伸试验表明，UPR/Al 2 O 3 Fe 复合材料的韧性略有改善，UPR/Al 2 O 3 Fe-VT 复合材料在 1.0 wt.% 颗粒负载下的韧性得到显着改善。还证明了 UPR/Al 2 O 3 Fe-VT 的显微维氏硬度增强和 DMA 性能的改善。