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将无机纳米材料与聚丙烯(PP)熔融共混制备耐候性PP复合材料。采用透射电子显微镜、凝胶渗透色谱、红外光谱以及力学性能测试等手段研究了纳米二氧化钛(nano-TiO_2)、纳米二氧化硅(nano-SiO_2)、纳米氧化锌(nanoZnO)等无机材料对PP抗紫外老化性的影响。结果表明,无机纳米材料的含量为0.3%时,分散性最好,可促使PP力学性能提高;PP/nano-TiO_2的抗紫外线老化性能最好,与纯PP相比,老化144 h后断裂伸长率保持率在波长为340 nm和313 nm紫外光源中分别提高了31.5%和11.8%。
Weathering PP composites were prepared by melt blending inorganic nanomaterials with polypropylene (PP). The effects of inorganic materials such as nano-TiO 2, nano-SiO 2 and nanoZnO on the PP resistance were studied by transmission electron microscopy, gel permeation chromatography, infrared spectroscopy and mechanical properties testing. UV aging effect. The results showed that the best dispersibility was obtained when the content of inorganic nano-material was 0.3%, which could promote the mechanical properties of PP. The anti-UV aging properties of PP / nano-TiO 2 were the best. Compared with pure PP, The rate of retentivity increased by 31.5% and 11.8% respectively at wavelength of 340 nm and 313 nm.