用DL-411改性的某含钒页岩提钒渣填充聚丙烯制备复合材料

摘要

Based on the analysis of the physical and chemical properties of vanadium tailing ( VT ) from a Vanadium Shale,the surface modification was carried out as a polymer filler. The modification effect of the three kinds of coupling agents on VT and the mechanical properties of the composites were compared to determine the suitable surface modification agent and modification processes for VT. The results show that the best modification agent is aluminate coupling agent DL-411. When the content of Dl-411 is 1. 2 % and the modification temperature was 100 ℃,the activity index of modified vanadium tailing is 95. 53%. FTIR analysis shows that DL-411 has the strongest binding ability on VT. XRD analysis shows that VT has a hetero-geneous nucleation on PP to inducedβform formation,and the DL-411 could enhance this nucleation. So the composites have higher strength and better toughness. When the content of MVT(mass ratio of modified vanadium tailing and PP) is 10 %,the tensile strength,impact strength and flexural strength of the composites are 47. 51 MPa,38. 43 kJ/m2 and 59. 57 MPa,respec-tively.%在对某含钒页岩提钒渣进行物理化学特性分析的基础上,对其进行了表面改性,以作为聚合物填料.对比了3种偶联剂对钒尾渣的改性效果及对复合材料的力学性能影响,并确定了该钒尾渣的表面改性工艺.结果表明:铝酸酯偶联剂DL-411对钒尾渣改性效果最好,其与钒尾渣质量比为1.2%,改性温度为100℃时,钒尾渣活性指数达95.53%.FTIR分析表明,DL-411在钒尾渣表面结合能力最强.XRD分析表明,钒尾渣对聚丙烯(PP)有异相成核作用,诱导PP中β晶型形成,DL-411改性能显著增强成核作用,使复合材料具有更高的强度和更好的韧性.当改性钒尾渣填充量(改性钒尾渣与聚丙烯的质量比)为10%时,复合材料的拉伸强度、抗冲击强度和抗弯曲强度分别为47.51 MPa、38.43 kJ/m2、59.57 MPa.