Abstract

The article presents the possibility of obtaining polymer composite materials based on thermoplastic polyimide and tungsten oxide (WO₃) modified with a hydrophobic silicone fluid. Data on surface microscopy, Vickers microhardness, density, and thermal stability of composites with different tungsten oxide contents are presented. As a result of modifying tungsten oxide, its surface becomes hydrophobic, and the contact angle increases from 31° to 101°. The microstructure of the surface of composites has a fine-grained structure without microcracks and chips. The lowest density material has no filler. With increasing filler content, the density increases. When the content of the filler is 80 wt %, the density is 4.35 g/cm³. The optimum content of tungsten oxide filler is 60 wt % as measured by the surface microhardness. The work shows that the introduction of the proposed filler significantly increases the heat resistance of polyimide. Pure polyimide is stable up to 425°С, and at a temperature of 680°С, its full thermal decomposition takes place. With increasing content of modified tungsten oxide in the composite, the rate of mass loss decreases. In the composite containing 60 wt % filler at 680°C, the mass loss is 38%.

中文翻译：

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填充氧化钨的聚酰亚胺基复合材料的力学性能

摘要

该文章提出了获得基于热塑性聚酰亚胺和氧化钨（WO ₃）的聚合物复合材料的可能性，该热塑性复合材料经疏水性硅油改性。给出了不同氧化钨含量的复合材料的表面显微镜数据，维氏显微硬度，密度和热稳定性。改性氧化钨的结果是，其表面变为疏水性，接触角从31°增加到101°。复合材料表面的微观结构具有无微裂纹和碎屑的细粒度结构。最低密度的材料没有填料。随着填料含量的增加，密度增加。当填料的含量为80重量％时，密度为4.35g / cm ^3。。通过表面显微硬度测量，氧化钨填料的最佳含量为60重量％。工作表明，提出的填料的引入显着提高了聚酰亚胺的耐热性。纯聚酰亚胺可在425°С的高温下保持稳定，并且在680°С的温度下会发生完全的热分解。随着复合物中改性氧化钨含量的增加，质量损失率降低。在680℃下含有60wt％填料的复合物中，质量损失为38％。