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Ground Tire Rubber Filled Flexible Polyurethane Foam—Effect of Waste Rubber Treatment on Composite Performance

机译:地面轮胎橡胶填充柔性聚氨酯泡沫泡沫效果对复合性能的废橡胶处理

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摘要

The application range of flexible polyurethane (PU) foams is comprehensive because of their versatility and flexibility in adjusting structure and performance. In addition to the investigations associated with further broadening of their potential properties, researchers are looking for new raw materials, beneficially originated from renewable resources or recycling. A great example of such a material is ground tire rubber (GTR)—the product of the material recycling of post-consumer car tires. To fully exploit the benefits of this material, it should be modified to enhance the interfacial interactions between PU and GTR. In the presented work, GTR particles were thermo-mechanically modified with the addition of fresh and waste rapeseed oil in the reactive extrusion process. The introduction of modified GTR particles into a flexible PU matrix caused a beneficial 17–28% decrease in average cell diameters. Such an effect caused an even 5% drop in thermal conductivity coefficient values, enhancing thermal insulation performance. The application of waste oil resulted in the superior mechanical performance of composites compared to the fresh one and thermo-mechanical modification without oils. The compressive and tensile performance of composites filled with waste oil-modified GTR was almost the same as for the unfilled foam. Moreover, the introduction of ground tire rubber particles enhanced the thermal stability of neat polyurethane foam.
机译:柔性聚氨酯(PU)泡沫的应用范围是全面的,因为它们在调整结构和性能方面的多功能性和灵活性。除了与进一步扩大其潜在特性的调查外,研究人员正在寻找新的原材料,有利地源于可再生资源或回收。这种材料的一个伟大的例子是地轮胎橡胶(GTR) - 消费后汽车轮胎的材料回收产品。为了充分利用这种材料的益处,应该被修改以增强PU和GTR之间的界面相互作用。在所呈现的工作中,通过在反应挤出过程中加入新鲜和废油菜籽油,GTR颗粒进行热机械改性。将改性的GTR颗粒引入柔性PU基质中引起了平均细胞直径的有益17-28%的降低。这种效果导致导热系数值下降均匀5%,增强了隔热性能。与新鲜的一个和无油的热机械改性相比,废油的应用导致复合材料的卓越机械性能。装有废油改性的GTR的复合材料的压缩和拉伸性能与未填充的泡沫几乎相同。此外,接地轮胎橡胶颗粒的引入增强了整齐的聚氨酯泡沫的热稳定性。

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