Silica nanoparticles (SiO₂ NPs) were prepared and functionalized with polyethylene (PE@SiO₂ NPs) using the surface-initiated polyhomologation (SI-polyhomologation) technique. Polyolefin nanocomposites were fabricated later by melt mixing of different ratios of the as-prepared SiO₂ NPs and PE@SiO₂ NPs with linear low-density polyethylene (LLDPE) and low-density polyethylene (LDPE) matrices. Firstly, SiO₂ NPs were modified with different alkoxysilane ligands, dichloro(divinyl)silane (DCDVS), allyl trimethoxysilane (ATMS), and vinyl triethoxylsilane (VTES). Subsequently, thexylborane, an initiator for SI-polyhomologation, was immobilized to the modified surface of SiO₂ NPs through hydroboration reactions. Polyhomologation was then allowed to proceed by adding monomer solution to form polyethylene brushes covalently bonded to the surface of the NPs. Physiochemical characterizations had confirmed the morphology, chemical structure, and thermal stability for each step of modification reactions. LLDPE and LDPE nanocomposites were prepared by extrusion with SiO₂ NPs and PE@SiO₂ NPs as nanofillers. Finally, tensile tests and morphological SEM-based analyses are presented to discuss the influence of the grafted PE on both the dispersion of the fillers and the mechanical properties of the filler/matrix interphase.

使用表面引发的多同系化（SI-多同系化）技术制备二氧化硅纳米粒子（SiO ₂ NPs）并用聚乙烯（PE@SiO _{2 NPs）对其进行功能化。随后通过将不同比例的所制备的 SiO 2} NPs 和 PE@SiO ₂ NPs 与线性低密度聚乙烯 (LLDPE) 和低密度聚乙烯 (LDPE) 基质熔融混合来制造聚烯烃纳米复合材料。首先，用不同的烷氧基硅烷配体、二氯（二乙烯基）硅烷（DCDVS）、烯丙基三甲氧基硅烷（ATMS）和乙烯基三乙氧基硅烷（VTES）对SiO _{2 NPs进行改性。}随后，将 SI-polyhomologation 的引发剂 xylborane 固定在 SiO _{2的改性表面上}NPs 通过硼氢化反应。然后通过添加单体溶液来进行多同系化，以形成共价键合到 NPs 表面的聚乙烯刷。物理化学表征证实了改性反应每一步的形态、化学结构和热稳定性。_{LLDPE 和 LDPE 纳米复合材料是通过以 SiO 2} NPs 和 PE@SiO ₂ NPs 作为纳米填料进行挤压制备的。最后，提出了拉伸试验和基于形态学 SEM 的分析，以讨论接枝 PE 对填料分散和填料/基体界面机械性能的影响。