title: A recycled environmental friendly flame retardant by modifying para-aramid fiber with phosphorus acid for thermoplastic polyurethane elastomer.
abstract: 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 CO2at 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.
authors.affiliation: 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.
authors.forename: Xilei
authors.initials: X
authors.lastname: Chen
authors.affiliation: 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.
authors.forename: Wenduo
authors.initials: W
authors.lastname: Wang
authors.affiliation: 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. Electronic address: jiaochm@qust.edu.cn.
authors.forename: Chuanmei
authors.initials: C
authors.lastname: Jiao
keywords: Flame retardant; Modification; Para-aramid fiber; Recycled; Thermoplastic polyurethane elastomer