The aim of the present study is to examine the effect of the addition of carbon nanoparticles (σsp2 hybridization) on the mechanical properties of foamed polystyrene. In this work, we focus on the study of the impact of compressive stress, tensile strength, bending strength, thermal conductivity ratio (λ), and water absorption of expanded polystyrene (EPS) reinforced with reduced graphene oxide and graphite. The results were compared with pristine EPS and reduced graphene oxide-reinforced EPS. All the nanocomposite specimens used for testing had a similar density. The study reveals that the nanocomposites exhibit different thermal conductivities and mechanical properties in comparison to pristine EPS. The enhancement in the properties of the nanocomposite could be associated with a more extensive structure of elementary cells of expanded polystyrene granules.

中文翻译：

---

还原氧化石墨烯增强发泡聚苯乙烯 (EPS) 纳米复合材料的机械、形态和热性能的制造和评估

本研究的目的是检查添加碳纳米粒子（σsp2 杂化）对泡沫聚苯乙烯机械性能的影响。在这项工作中，我们重点研究了用还原氧化石墨烯和石墨增强的膨胀聚苯乙烯 (EPS) 的压缩应力、拉伸强度、弯曲强度、导热系数 (λ) 和吸水率的影响。将结果与原始 EPS 和还原氧化石墨烯增强的 EPS 进行了比较。用于测试的所有纳米复合材料样品都具有相似的密度。研究表明，与原始 EPS 相比，纳米复合材料表现出不同的热导率和机械性能。