摘要
以氧化石墨(GO)为原料,制备了苯甲酸功能化石墨烯(BFG),采用IR和XRD对BFG结构进行了表征。再将BFG作为阻燃协效剂添加到Al(OH)_3/聚丙烯(PP)中,研究不同质量比的BFG与Al(OH)_3对PP材料阻燃和力学性能的影响。通过对阻燃BFG-Al(OH)_3/PP复合材料进行极限氧指数(LOI)测试、热失重分析、锥形量热分析、拉伸测试及残炭SEM分析,考察BFG-Al(OH)_3/PP复合材料的阻燃性能和力学性能。研究结果表明,与其他阻燃PP相比,1.5wt%BFG-38.5wt%Al(OH)_3/PP的阻燃和力学性能最佳,LOI可达到24.6%,拉伸强度为20.64 MPa,且其热释放速率峰值和总热释放量比纯PP分别降低了51.5%和18.6%。
The graphene functionalized by benzyl acid(BFG)was prepared based on graphene oxide(GO).The structure and morphology of BFG were characterized by IR and XRD.BFG,as a kind of flame retardant synergist,was added to Al(OH)_3/polypropylene(PP),in which Al(OH)_3 was used as the flame retardant.The effect of mass ratio of BFG to Al(OH)_3 on the flame retardancy and mechanical properties of BFG-Al(OH)_3/PP composites was studied.The limiting oxygen index(LOI)test,thermogravimetric analysis,cone calorimetry analysis,tensile test and residual carbon scanning analysis were progressed to investigate the flame retardancy and mechanical properties of BFG-Al(OH)_3/PP composites.The results show that the flame retardancy and mechanical properties of 1.5 wt%BFG-38.5 wt%Al(OH)_3/PP composite are the best,whose LOI is 24.6%,tensile strength is 20.64 MPa,respectively,and its thermal release rate peak and total heat release is reduced by 51.5% and 18.6% compared with the pure PP sample,respectively.
引文
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