The current study aims to develop polyvinyl chloride (PVC) nanocomposites with enhanced electrical and mechanical properties by incorporating titanium oxide (TiO₂) nanoparticles within PVC chains. Different loading of nanoparticles and different nanoparticle surface states were considered. The surface states are unfunctionalised, functionalised using vinyl silane and functionalised using amino silane. The choice of a most suitable surface state was a critical factor that guarantees a good dispersion of nanoparticles and consequently enhances the compatibility between TiO₂ and PVC matrix. The process followed in the PVC/TiO₂ nanocomposites preparation, loaded with different wt.% of TiO₂ nanoparticles, was the solvent method. The dielectric properties measured here were the relative permittivity (ɛ _r), dielectric loss (tanδ), breakdown strength (AC and DC under uniform field) and the internal partial discharges (PDs) within insulation cavity. All measurements have been performed under room temperature and at frequency ranged from 20 to 1.0 MHz. Furthermore, the mechanical properties of the samples like elongation, elasticity modulus and tensile strength were also studied. Vinyl silane showed better improvements in both electrical and mechanical performances compared to the amino silane, especially in cases of high weight fractions of TiO₂. This is because of the improvement in the PVC-TiO₂ interfacial region arise from the similarity of polarity and surface tension values of vinyl silane with that of PVC matrix and TiO₂ nanoparticles.

当前的研究旨在通过在PVC链中掺入氧化钛（TiO ₂）纳米颗粒来开发具有增强的电气和机械性能的聚氯乙烯（PVC）纳米复合材料。考虑了不同的纳米颗粒负载量和不同的纳米颗粒表面状态。表面状态是未官能化的，使用乙烯基硅烷官能化的和使用氨基硅烷官能化的。选择最合适的表面状态是确保纳米颗粒良好分散并因此提高TiO ₂与PVC基体之间相容性的关键因素。此过程遵循的方法是在PVC / TiO ₂纳米复合材料中添加不同重量百分比的TiO ₂纳米粒子，是溶剂法。这里所测量的介电性能的相对介电常数（ɛ _{- [R} ），介电损耗（tanδ δ），击穿强度（AC和DC下均匀的场）和绝缘空腔内的内部局部放电（PDS）。所有测量均在室温和20至1.0 MHz的频率范围内进行。此外，还研究了样品的机械性能，如伸长率，弹性模量和拉伸强度。与氨基硅烷相比，乙烯基硅烷在电气和机械性能方面均表现出更好的改进，尤其是在TiO _2的重量分数较高的情况下。这是由于PVC-TiO ₂的改进乙烯基硅烷与PVC基体和TiO ₂纳米粒子的极性和表面张力值相似，产生了界面区域。