ADP/OMMT/Co-OSA对TPU/EVA阻燃体系阻燃性能的影响  

Effect of ADP/OMMT/Co-OSA on Flame Retardancy of TPU/EVA Flame Retardant System

作　　者：张文龙[1,2,3] 朱曼 孙贺霞 马英一 戴亚杰 ZHANG Wenlong;ZHU Man;SUN Hexia;MA Yingyi;DAI Yajie(College of Material Science&Engineering,Harbin University of Science and Technology,Harbin,Heilongjiang 150040,China;Ministry of Education Key Laboratory of Engineering Dielectrics and Its Application,Harbin,Heilongjiang 150080,China;Yangzhou Longda Electrical Material Co.,Ltd.,Yangzhou,Jiangsu 225222,China)

机构地区：[1]哈尔滨理工大学,材料科学与工程学院,黑龙江哈尔滨150040 [2]工程电介质与及其应用教育部重点实验室,黑龙江哈尔滨150080 [3]扬州龙达电工材料有限公司,江苏扬州225222

出　　处：《塑料》2021年第4期19-24,共6页Plastics

摘　　要：分别在热塑性聚氨酯弹性体/乙烯-醋酸乙烯酯(TPU/EVA)阻燃体系中加入3种协效阻燃剂:二乙基次膦酸铝(ADP)、有机蒙脱土(OMMT)和金属络合物(Co-OSA),并研究其对共混体系的阻燃性能、介电性能、力学性能、热失重性能、耐水性能和熔体流动速率的影响。结果表明,3种协效阻燃剂均使复合材料的热失重性能和熔体流动速率显著增大。其中,OMMT对共混材料的热失重性能的提高最显著,Co-OSA对复合材料的熔体流动性的改善最显著。当ADP、OMMT以及合成的Co-OSA的含量分别为4%、6%、6%时,共混材料的整体性能达到最佳:极限氧指数(LOI)分别为29.8%、29.1%、31.5%,残重率分别提高了9.53%、27.38%和4.44%,拉伸强度分别为6.71.6.49和7.21 MPa,断裂伸长率分别为415.45%、453.76%和553.43%,体积电阻率分别为2.61×10^(8)、2.82×10^(8)和3.65×10^(8)Ω·m,击穿场强分别为21.62、21.43和21.78 mV/m,浸水后,体系的拉伸强度分别降低了7.30%.9.55%和1.25%。通过对比3种协效阻燃剂可知,Co-OSA对共混材料的LOI值、介电性能、力学性能、耐水性能的改善效果更显著。Three synergistic flame retardants were added to TPU/EVA flame retardant system: aluminum diethylhypophosphonate( ADP),organic montmorillonite( OMMT) and metal complex( Co-OSA). The effects of the blends on the flame retardancy,dielectric properties,mechanical properties,thermogravimetric properties,water resistance and melt index were discussed. The results showed that the incorporation of three synergistic flame retardants significantly enhanced the thermogravimetric and melt flow properties of the composite. Among them, OMMT improved the thermogravimetric properties of the blends most significantly,and Co-OSA improved the melt fluidity of the composites most significantly. When the contents of ADP,OMMT and Co-OSA were 4%,6% and 6%,respectively,the overall properties of the blends were the best: the LOI was 29. 8%,29. 1% and 31. 5% respectively,the residual weight increased by9. 53%,27. 38% and 4. 44% respectively,the tensile strength was 6. 71,6. 49 and 7. 21 MPa respectively,the elongation at break was 415. 45%,453. 76% and 553. 43% respectively,the volume resistivity was 2. 61 × 108,2. 82 × 108 and 3. 65 × 108Ω·m respectively. The breakdown field strength was 21. 62,21. 43 and 21. 78 m V/m respectively. After immersion,the tensile strength of the system was reduced by 7. 30%,9. 55% and 1. 25% respectively. Compared with the three synergistic flame retardants,Co-OSA improved the LOI,dielectric properties,mechanical properties and water resistance of the blends more significantly.

关 键 词：TPU/EVA 协效阻燃剂 介电性能 热失重 力学性能 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业] TQ325.5