以石墨烯（GN）改性聚苯乙烯（PS），制备了阻燃型PS/GN保温材料，并研究其力学性能、热学性能等。研究表明：KH-550成功接枝到了GN表面。随着GN掺量的增加，PS/GN保温材料的力学性能、耐热性能逐渐提高，导热系数逐渐降低。GN掺量未超过0.3%时，PS/GN保温材料的力学性能、耐热性能增长显著，导热系数增长不大。GN的最佳掺量为0.3%，此时PS/GN保温材料的压缩强度提高37.2%，起始降解温度提高29 ℃，残炭率提高0.7%，导热系数为0.037 1 W/（m·K）。

Graphene (GN) modified polystyrene (PS) was used to prepare flame retardant PS/GN thermal insulation material, and its mechanical properties and thermal properties were studied. The results show that KH-550 is successfully grafted onto the surface of GN. With the increase of GN content, the mechanical properties and heat resistance of PS/GN insulation materials gradually increase, and the thermal conductivity gradually decreases. When the content of GN is not more than 0.3%, the mechanical properties and heat resistance of PS/GN insulation material increase significantly, and the thermal conductivity increases little. The optimum content of GN is 0.3%, at this time, the compressive strength of PS/GN insulation material is increased by 37.2%, the initial degradation temperature is increased by 29 ℃, the mass residue is increased by 0.7%, and the thermal conductivity is 0.037 1 W/(m·K).