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将无机纳米材料、线性低密度聚乙烯(LLDPE)、高密度聚乙烯(HDPE)与聚丙烯(PP)熔融共混制备PP/LLDPE/HDPE/无机纳米耐候性复合材料。采用透射电子显微镜(TEM)、红外光谱仪(IR)、紫外-可见光谱仪(UW-V)以及力学性能测试等手段研究了聚乙烯(PE)/nano-SiO_2、PE/nano-TiO_2、PE/nano-ZnO复合体系对PP低温脆性和抗紫外老化性的影响。结果表明,复合材料中,无机纳米材料的质量分数为l%时,分散性最好,可促使PP与PE之间相互作用增强。PP/LLDPE/HDPE/nano-SiO_2低温抗冲击性能最好,温度为-10℃时其冲击强度保持率由纯PP的20.2%提高到了59.3%;PP/LLDPE/HDPE/nano-TiO_2的抗紫外线老化性能最好,老化144 h后断裂伸长率和冲击强度保持率分别提高到了43.9%和48.0%。
PP / LLDPE / HDPE / inorganic nano-weatherable composites were prepared by melt blending inorganic nanomaterials, LLDPE, HDPE and PP. The effects of polyethylene (PE) / nano-SiO_2, PE / nano-TiO_2, PE / nano-nano were studied by transmission electron microscopy (TEM), infrared spectroscopy (IR), UV-visible spectroscopy (UW- -ZnO composite system on the low temperature brittleness and UV aging resistance of PP. The results show that when the mass fraction of inorganic nanomaterials is 1%, the dispersibility is the best, which can promote the interaction between PP and PE. The impact strength retention of PP / LLDPE / HDPE / nano-SiO_2 was the best at low temperature. The retention of impact strength of PP / LLDPE / HDPE / nano-SiO_2 increased from 20.2% to 59.3% The aging performance was the best. The elongation at break and the retention of impact strength increased to 43.9% and 48.0% respectively after aging for 144 h.