【摘要】 将纳米钛合金与聚丙烯(PP)经熔融共混制得PP/纳米钛合金复合材料,研究了PP及其复合材料在大气暴露条件下的耐候性,利用傅立叶变换红外光谱仪分析了老化前后PP及其复合材料的化学结构。结果表明,纳米钛合金能明显地改善PP的耐候性。在大气条件下暴露90d后,复合材料的断裂伸长率和缺口冲击强度保持率明显高于纯PP;复合材料的拉伸强度、拉伸弹性模量甚至还高于暴露前的值,而纯PP的拉伸强度则小于暴露前的值,拉伸弹性模量的增幅也小于复合材料。更多还原

【Abstract】 PP/nano-Ti-alloy composites were prepared by melt blending of PP with nano-Ti-alloy. The climate-resistant properties of PP and its composites were studied, and the chemical structures of aged PP and its composites were charaterized by FTIR. The results revealed that nano-Ti-alloy powder could markedly improve the climate-resistant properties of PP. After exposing out of doors for 90 days, the conservation rates of breaking elongation and impact strength of the composites were markedly higher than those of PP; the stretch modulus and tensile strength of composites were improved compared with those of their corresponding no-exposed composites, while the tensile strength of PP was lower than its original value and the improving extent of stretch modulus of PP was less than those of composites.更多还原