College of Environment and Safety Engineering, Qingdao University of Science and Technology, Key Laboratory of Rubber-plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao, Shandong 266042, PR China.
College of Environment and Safety Engineering, Qingdao University of Science and Technology, Key Laboratory of Rubber-plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao, Shandong 266042, PR China.
J Hazard Mater. 2017 Jun 5;331:257-264. doi: 10.1016/j.jhazmat.2017.02.011. Epub 2017 Feb 24.
The application of fibers is more and more extensive, and the pollution caused by abandoned fibers is getting more serious, which has aroused wide attention. So it is necessary to find a way to solve the problem. In this paper, the para-aramid fiber (AF) was recycled and modified by phosphoric acid, and then was applied as environmental friendly flame retardant for thermoplastic polyurethane elastomer (TPU). The flame retardant properties of TPU were tested using cone calorimeter test (CCT) and thermogravimetric/Fourier transform infrared spectroscopy (TG-IR). The CCT test showed that AF-P had better flame retardant effect on TPU than pure AF. Remarkably, the pHRR value for the sample with 1.00wt% content of AF-P was decreased by 48.1%; AF-P had improved the char forming progress and the residual mass was 30.6%, which was much more than pure TPU. TG test showed that AF-P could improve the thermal stability of TPU at high temperature. The TG-IR test revealed that AF-P had reduced the release of CO at the beginning. Based on the above results, it will make a great influence on the study of reuse of fibers and environmental friendly flame retardant of polymer.
纤维的应用越来越广泛，废弃纤维造成的污染也越来越严重，引起了广泛关注。因此，有必要寻找一种解决问题的方法。本文采用磷酸对芳纶纤维（AF）进行回收和改性，并将其作为环境友好型阻燃剂应用于热塑性聚氨酯弹性体（TPU）中。采用锥形量热仪（CCT）和热重/傅里叶变换红外光谱（TG-IR）对 TPU 的阻燃性能进行了测试。CCT 测试表明，AF-P 对 TPU 的阻燃效果优于纯 AF。值得注意的是，添加 1.00wt%AF-P 的样品的 pHRR 值降低了 48.1%；AF-P 改善了炭化进程，残炭量为 30.6%，明显高于纯 TPU。TG 测试表明，AF-P 可以提高 TPU 在高温下的热稳定性。TG-IR 测试表明，AF-P 减少了 CO 在初期的释放。基于以上结果，这将对纤维的再利用和聚合物环境友好型阻燃剂的研究产生重大影响。
