The epoxy resin is an important part of superconducting devices, and nanoparticles can improve the properties of the epoxy resin at low temperature. However, the performance of epoxy/nanoparticles composites at low temperature is still unclear. In this work, pure epoxy and three epoxy-polyhedral oligomeric silsesquioxanes (POSS) composites models are proposed. The results of molecular dynamics (MD) simulation show that POSS nanoparticles can improve the mechanical properties (bulk modulus, Young's modulus and shear modulus) of the epoxy at low temperature. As for the mean square radius of gyration and the mean square displacement, different organic groups in POSS particles have different effects on the epoxy resin.

中文翻译：

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基于分子动力学模拟的环氧-POSS复合材料的低温性能

环氧树脂是超导器件的重要组成部分，纳米粒子可以改善环氧树脂的低温性能。然而，环氧树脂/纳米颗粒复合材料在低温下的性能仍不清楚。在这项工作中，提出了纯环氧树脂和三个环氧树脂-多面体低聚倍半硅氧烷 (POSS) 复合材料模型。分子动力学（MD）模拟结果表明，POSS纳米粒子可以提高环氧树脂的低温力学性能（体积模量、杨氏模量和剪切模量）。对于均方回转半径和均方位移，POSS颗粒中不同的有机基团对环氧树脂的影响不同。