The structure and optic properties of the transparent PP+SiO₂ nanocomposites with a relatively high refractive index and enhanced luminescence properties were investigated. X-ray analysis, Fourier-transform infrared (FTIR), Visible-ultraviolet, and photoluminescence spectroscopic methods were used for investigation. The XRD analysis indicated that the fraction of the amorphous phase of the polycrystalline polymer decreases with the introduction of SiO₂ nanoparticles. Even though SiO₂ nanoparticle is amorphous itself, they play the role of the crystallinity centers in the polymer matrix, and the degree of crystallinity increases in polymer nanocomposites. According to UV-vis spectroscopic analysis that, with the increasing of the concentration of SiO₂ nanoparticles distributed in the polymer matrix, the absorption intensity of the samples also increases. It was explained by the hyperchromic effect which is related to raising the optical density of the polymer by introducing the filler particles (SiO₂). It was calculated bandgap energy and refractive index on the base of the UV spectra of samples. It has been found that at low concentrations of amorphous silica nanoparticles, the polymer nanocomposite retains its transparency despite having a relatively high refractive index (1.96). Furthermore, the photoluminescence (PL) spectrum of nanocomposites was investigated depending on filler concentration. It was clear that the intensity of the PL spectrums increases with the increase of the filler concentration that is explained by the raising of the luminescence centers in the nanocomposite material. These luminescence centers are oxygen-deficit centers in the spatial structure of the amorphous silica nanoparticles.

研究了具有较高折射率和增强发光性能的透明PP+SiO ₂纳米复合材料的结构和光学性能。使用 X 射线分析、傅里叶变换红外 (FTIR)、可见紫外和光致发光光谱方法进行研究。XRD 分析表明，随着SiO ₂纳米粒子的引入，多晶聚合物的非晶相的比例降低。尽管SiO ₂纳米粒子本身是无定形的，但它们在聚合物基体中起到结晶中心的作用，并且在聚合物纳米复合材料中结晶度增加。紫外-可见光谱分析表明，随着 SiO2 浓度的增加，₂纳米粒子分布在聚合物基体中，样品的吸收强度也增加。这可以通过与通过引入填料颗粒 (SiO ₂）。根据样品的紫外光谱计算带隙能量和折射率。已经发现，在低浓度的无定形二氧化硅纳米粒子下，聚合物纳米复合材料尽管具有相对较高的折射率 (1.96)，但仍保持其透明度。此外，根据填料浓度研究了纳米复合材料的光致发光 (PL) 光谱。很明显，PL 光谱的强度随着填料浓度的增加而增加，这可以通过纳米复合材料中发光中心的升高来解释。这些发光中心是无定形二氧化硅纳米粒子空间结构中的缺氧中心。