DOPO衍生物的合成及其在阻燃聚碳酸酯中的应用

摘要

合成一种DOPO衍生物对[3-羧基-3-(6-氧-(6H)-二苯并-(c,e)(1,2)-氧膦杂己环-6-酮)丙酰胺基]苯磺酸钾(DOPO-ACA)并添加到聚碳酸酯(PC)中,制备PC/DOPO-ACA复合材料.通过极限氧指数(LOI)、垂直燃烧(UL94)及热重分析测试对纯PC和PC/DOPO-ACA复合材料的阻燃性能、热稳定性进行研究,同时研究了材料的力学性能.结果表明,DOPO-ACA具有较高的阻燃效率,当添加的DOPO-ACA质量分数为0.1％时,其LOI为34.5％且达到UL94 Ⅴ-0级,但DOPO-ACA未能改善复合材料炭层的热稳定性;当DOPO-ACA添加量小于0.25％时,其力学性能基本不受影响.%DOPO derivative potassium 4-(3-carboxy-3-(6-oxidodibenzo [c,e] [1,2]oxaphosphinin-6-yl) propanamido) benzenesulfonate (DOPO-ACA) was synthesized and a series of polycarbonate (PC) /DOPO-ACA composites were prepared by the incorporation of DOPO-ACA via melt extrusion process.The flame retardancy,thermal degradation and mechanical properties of the samples were evaluated using limited oxygen index (LOI) measurement,vertical burning test (UL94),thermogravimetric analysis and mechanical testing.The results show that the DOPO-ACA is a highly effective flame retardant for PC.The PC/DOPO-ACA composites can obtain LOI value of 34.5 ％ and UL94 Ⅴ-0 rating by adding 0.1 wt％ DOPO-ACA,but the thermal stability of char layer cannot be improved by the incorporation of DOPO-ACA.The mechanical properties of composites are not nearly affected when DOPO-ACA addition is less than 0.25wt％.