【摘要】 采用四乙氧基硅烷（TEOS）作为改性修饰剂,分别对季戊四醇（PER）和聚磷酸铵（APP）进行表面改性,制备得到膨胀型阻燃剂（IFR）,对改性后的IFR进行了红外光谱及热失重分析等表征,确认了硅的引入;向改性阻燃剂中加入纳米氧化镧（La₂O₃）作为阻燃协效剂,然后与聚丙烯（PP）混合,制备了疏水性膨胀型阻燃PP;研究了改性前后复合阻燃剂对PP阻燃性能和力学性能的影响。结果表明,改性后的阻燃体系表现出了较好的疏水性能,加入协效剂La₂O₃后,材料的阻燃性能和力学性能均较改性之前有所提高。更多还原

【Abstract】 Pentaerythritol and ammonium polyphosphate were surface-modified with tetraethoxysilane to prepare a series of intumescent flame retardants（IFR）.The surface modification effect was confirmed by FTIR and TGA analysis.Nano Lanthanum Oxide（La₂O₃）were added into the modified flame retardants as a synergistic additive for flame retardancy and then melt blended with polypropylene（PP）to prepare the hydrophobic flame-retardant PP.The modification technology,the flame retardant and mechanical properties of polypropylenes were investigated.The results indicated that the hydrophobic properties of the modified PP were improved,and their flame-retardant and mechanical properties were improved considerably with the addition of La₂O₃.更多还原