R-PP/BM/SEP复合材料的制备及其性能  

Preparation and properties of R-PP/BM/SEP composites

作　　者：李湘 Li Xiang(Hunan Chemical Vocational Technology College,Zhuzhou 412000,China)

机构地区：[1]湖南化工职业技术学院,湖南株洲412000

出　　处：《合成树脂及塑料》2024年第2期26-29,共4页China Synthetic Resin and Plastics

基　　金：湖南省教育厅资助科研项目(23B0965)。

摘　　要：以日杂聚丙烯废塑料(简称R-PP)为原料,海泡石(SEP)和勃姆石(BM)为阻燃剂,通过熔融挤出制备了R-PP/BM/SEP复合材料,对复合材料的极限氧指数(LOI)、垂直燃烧等级(UL 94)及力学性能进行测试与分析。结果表明:w(BM)为25%时,R-PP/BM复合材料的LOI提高到26.9%,厚度为3.2 mm的试样阻燃等级达UL 94 V-1级,质量损失5%时的温度(t_(5%))、质量损失速率最大时的温度(t_(max))和残炭量都相应提高;SEP与BM在R-PP中有协同阻燃效果,w(SEP)为3%,w(BM)为22%时,复合材料的LOI为31.4%,厚度为3.2,2.0 mm的试样阻燃等级分别达到UL 94 V-0,V-1级,与单独添加25%(w)BM的R-PP/BM复合材料相比,其热释放速率峰值、平均热释放速率、总热释放量和总生烟量较低,点燃时间,火灾性能指数,t_(5%),t_(max)和残炭量较高;添加SEP可以提高R-PP/BM的力学性能。Recycled polypropylene(R-PP)waste plastics were used as raw materials and sepiolite(SEP)and boehmite(BM)as flame retardants to prepare R-PP/BM/SEP composites via melt extrusion.The limiting oxygen index(LOI),upright combustion grade of UL94 and mechanical properties of the composites were measured and analyzed.The results show that when the mass fraction of BM is 25%,the LOI of the composites is increased to 26.9%,the flame retardancy of the sample whose thickness is 3.2 mm reaches UL 94 V-1,the temperature at the mass loss of 5%(t_(5%)),the temperature at the mass loss of maximum(t_(max))and carbon residue are increased correspondingly.SEP and BM have synergistic flame retardant effect in R-PP.When the mass fraction of SEP and BM are 3%and 22%,the LOI of the composites is 31.4%,and the flame retardability of the composites reach UL 943.2 mm V-0 and 2.0 mm V-1,whose heat release rate peak,average heat release rate,total heat release and total smoke production are lower than those of R-PP/BM with the mass fraction of 25%of BM,whose ignition time,fire performance indexes,t 5%,tmax and carbon residue are higher than those with the mass fraction of 25%of BM.SEP can improve the mechanical properties of R-PP/BM.

关 键 词：日杂聚丙烯废塑料 海泡石 勃姆石 锥形量热 

分 类 号：TQ314.248[化学工程—高聚物工业]