研究探讨不同聚羟基脂肪酸酯（PHA）添加量对聚苯乙烯（PS）泡沫复合材料性能的影响。结果表明：随着PHA质量分数从0增至15%，复合材料的密度和维卡软化温度分别增至0.54 g/cm³和94.10 ℃，孔隙率和孔径减小，力学性能（拉伸和弯曲强度）提升，热稳定性增强。在PS中添加15% PHA使复合材料的抗老化性能和生物降解性能得到改善，质量损失率较低，仅为1.50%，90 d降解率为12.40%。综合分析表明，在PS中添加15% PHA制备的复合材料具有在建筑墙体中的应用潜力。

The study investigates the effects of different polyhydroxyalkanoates (PHA) contents on the properties of polystyrene (PS) foam composites. The results show that as the mass fraction of PHA increases from 0 to 15%, the density and Vicat softening temperature of the composites increase to 0.54 g/cm³ and 94.10 ℃, respectively, while the porosity and pore size decrease. The mechanical properties (tensile and flexural strength) are enhanced, and the thermal stability is improved. Adding 15% PHA to PS improves the aging resistance and biodegradability of the composites, with a low mass loss rate of only 1.50% and a degradation rate of 12.40% after 90 days. A comprehensive analysis indicates that composites prepared with 15% PHA in PS have potential for application in building walls.