以焦磷酸哌嗪(PAPP)为阻燃剂,选用氧化石墨烯(GO)、纳米蒙脱土(DK2)、硼酸锌(ZnB)作为协效剂与PAPP分别构成二元阻燃体系和三元阻燃体系.二元阻燃体系包括PAPP与DK2、PAPP与ZnB、PAPP与GO;三元阻燃体系包括PAPP、GO和ZnB及PAPP、DK2和ZnB.分别将上述二元阻燃体系及三元阻燃体系与聚丁二酸丁二醇酯(PBS)熔融共混制备PBS阻燃复合材料,研究不同复配体系阻燃剂的加入对PBS阻燃性能和力学性能的影响.结果表明,当PAPP含量为16.5％、DK2含量为1.5％、ZnB含量为2％时,PBS复合材料通过了 UL 94垂直燃烧测试,达到了 V-0级,极限氧指数(LOI)达到32.4％,最大热释放速率峰值(PHRR)和总烟释放率(TSP)分别为227 kW/m2和3.4 m2,与加入20％PAPP(FRPBS)相比,分别降低了 50％和69％,残炭率达到13.8％,此外,拉伸强度为13.5 MPa,断裂伸长率为613.8％,冲击强度为8.0 kJ/m2,与FRPBS相比,分别提升了 9.1％、17.2％和40.3％.结果表明,三元阻燃体系能够同时提升PBS复合材料的阻燃性能力学性能.
Abstract
With piperazine pyrophosphate(PAPP)as the flame retardant,graphene oxide(GO),nano montmorillonite(DK2)and zinc borate(ZnB)were selected as synergists to form a binary flame-retardant system and ternary flame-retardant system respectively.The binary flame-retardant system included PAPP and DK2,PAPP and ZnB,PAPP and GO,and the ternary flame-retardant system included PAPP,GO and ZnB and PAPP,DK2 and ZnB.Then,the above-mentioned binary flame-retardant system and ternary flame-retardant system were mixed with polybutylene succinate(PBS)to prepare PBS flame retardant composite respectively.The impact of the addition of flame retardants in different compound systems on the flame retardant and mechanical properties of PBS was explored.The results showed that when the PAPP content was 16.5％,the DK2 content was 1.5％,and the ZnB content was 2％,the PBS composite passed the UL 94 V-0 level in vertical burning test,reaching a limit oxygen index(LOI)of 32.4％.Its peak heat released rate(PHRR)and total smoke released(TSP)were 227 kW/m2 and 3.4 m2 respectively,which were 50％and 69％lower that of PBS composite with 20％PAPP(FRPBS),and the residual char was 13.8％.In addition,the tensile strength was 13.5 kJ/m2,the fracture elongation was 613.8％,and the impact strength was 8.0 kJ/m2,which was 9.1％,17.2％and 40.3％higher than that of FRPBS respectively.The results showed that the ternary flame-retardant system could improve the flameretardant performance and the mechanical properties of PBS at the same time.
维普
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