论文部分内容阅读
成功制备了一种核-壳结构的磷酸钛阻燃剂(F-TiP),并通过熔融共混法将其添加到聚碳酸酯(PC)中。采用极限氧指数测试(LOI)、垂直燃烧试验(UL-94)、热重分析(TG)及拉伸测试等方法,分析了该复合材料的阻燃和力学性能。结果表明:核-壳结构磷酸钛阻燃剂的最优含量为6%,此时复合材料体系的LOI为32.7%,同时其达到了UL-94的V-0级别。由于F-TiP阻燃剂的存在,TG分析结果显示炭层成碳量增加,且SEM分析显示炭层结构更为致密,并发现磷酸钛核和功能化壳之间存在协同阻燃作用。在6%范围内,随阻燃剂F-TiP含量的增加,复合材料的拉伸强度上升,断裂伸长率下降。
A core-shell titanium phosphate flame retardant (F-TiP) was successfully prepared and added to polycarbonate (PC) by melt blending. The flame retardancy and mechanical properties of the composites were analyzed by means of LOI, UL-94, TG and tensile test. The results show that the optimal content of core-shell Ti (Ti) 6 flame retardant is 6%, and the LOI of the composites is 32.7% at the same time it reaches the V-0 level of UL-94. Due to the presence of F-TiP flame retardant, the results of TG analysis showed that the amount of carbon in the carbon layer increased, and SEM analysis showed that the carbon layer structure was more compact, and synergistic flame retardation was found between the titanium phosphate nucleus and the functionalized shell. In the range of 6%, with the increase of the content of F-TiP, the tensile strength of the composites increases and the elongation at break decreases.