摘要
以聚丙烯(PP)为基体树脂,加入无卤膨胀型阻燃剂、增韧剂制备新能源汽车电池包专用阻燃PP材料,研究了阻燃剂、增韧剂种类及其含量对PP阻燃性能和力学性能的影响,以及阻燃剂对PP的耐水性及热稳定性的影响。结果表明,两种阻燃剂FR–1420和HF–900均能提高PP的阻燃性,当垂直燃烧等级达到V–0级时,FR–1420和HF–900的最低含量分别为20%和25%;添加FR–1420的PP的阻燃性、耐水性、热稳定性及力学性能均优于添加HF–900的体系;三种增韧剂体系POE8150,POEDF610,EPDM3745复配VMX6202均能提高阻燃PP的冲击强度,其中POEDF610性价比最高,当其含量为10%时,阻燃PP材料的冲击强度达到25.5kJ/m~2。采用该阻燃PP材料吸塑成型的新能源汽车电池包上盖各项性能可满足使用要求,达到客户的预期目标。
The flame retardant polypropylene(PP) for new energy automobile battery pack was prepared by adding the halogen-free intumescent flame retardant and toughener. The effects of flame retardants,tougheners and their contents on theflame retardancy and mechanical properties of PP,as well as the effects of flame retardants on the water resistance and thermal stability of PP were studied. The results show that both FR–1420 and HF–900 can improve the flame retardancy of PP. When the vertical combustion grade reaches V–0,the minimum contents of FR–1420 and HF–900 are 20% and 25% respectively. The flame retardancy,water resistance,thermal stability and mechanical properties of PP with FR–1420 are better than those with HF–900. The impact strength of flame retardant PP can be improved by POE8150,POEDF610 and EPDM3745 compounded with VMX6202. Among them,POEDF610 has the highest cost-performance ratio. When the content of POEDF610 is 10%,the impact strength of flame retardant PP reaches 25.5 kJ/m~2. The performance of the new energy automobile battery pack top cover by theflame-retardant PP absorbable molding can meet the use requirement,and it achieves the desired target of customers.
引文
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