阻燃型丁腈橡胶/氯化聚丙烯橡塑复合材料的制备与性能研究

通过在丁腈橡胶(NBR)/氯化聚丙烯(CPP)橡塑复合材料中添加协同阻燃剂三氧化二锑,制备了阻燃型NBR/CPP橡塑复合材料,考察了三氧化二锑用量对NBR/CPP橡塑复合材料硫化特性、力学性能和燃烧性能的影响。实验结果表明:三氧化二锑的加入没有降低NBR/CPP橡塑复合材料的加工性能;当三氧化二锑用量为10.0份时,NBR/CPP橡塑复合材料的拉伸强度、300%定伸应力和邵氏硬度分别增加了15.7%、112%和10.9%;复合材料的氧指数(LOI)随三氧化二锑用量的增加逐渐增大,当三氧化二锑用量为2.5份时,复合材料氧指数为27.4%,达到自熄级阻燃效果。

Study on the Preparation and Characterization of Flame-retardant Acrylonitrile-butadiene Rubber/Chlorinated Polypropylene Rubber-plastic Composites

The flame-retardant acrylonitrile-butadiene rubber(NBR)/chlorinated polypropylene(CPP)rubber-plastic composites were prepared by adding antimony trioxide(Sb2O3)which is synergistic flame-retardant.The influences of the loading of Sb2O3 on curing characteristics,mechanical properties and flammability properties were evaluated.The experimental results showed that the processability of the blend system was not reduced with the increase of Sb2O3 loading.When the loading of Sb2O3 was at 10.0 phr.,the tensile strength,300% modulus and Shore A hardness of the composites were respectively improved by 15.7%,112% and 10.9%.The limiting oxygen index(LOI)of the composites was increased with the increase of Sb2O3 loading.When the content of Sb2O3 was 2.5 phr,the LOI of the composites was up to 27.4%,which indicated that the inflammability of the composites was distinctly enhanced.