PET硬质闭孔泡沫作为夹芯材料广泛应用于风电叶片。为进一步做好退役叶片的规模化利用，实现风电叶片材料绿色可持续发展，PET材料的有效利用方面的研究日益受到关注。文章利用旋转流变仪研究了PET泡沫回收粉料（Re-fPET）的动态流变性能，Re-fPET回收料复合黏度对温度敏感，呈现明显的剪切变稀行为，在270 ℃以上复合黏度下降更明显。通过Cross方法外推求得零剪切黏度η₀，并进一步根据Arrhenius计算黏流活化能，ΔE_η0为241.29 kJ/mol，升高温度对链段间的解缠结作用明显。采用转矩流变仪研究了Re-fPET回收粉料的加工流变特性，在270 ℃以上，Re-fPET树脂扭矩值下降很快且达到平衡时间更短，平衡后扭矩值更小，熔体特性黏度明显下降，材料明显降解，不利于加工。

PET rigid closed-cell foam is widely used as a sandwich material in wind turbine blades, in order to further improve the large-scale utilization of retired blades and realize the green and sustainable development of wind turbine blade materials, the effective utilization of PET materials has attracted increasing attention. In this paper, the dynamic rheological properties of PET foam recycled powder (Re-fPET) were studied by rotational rheometer, and the composite viscosity of Re-fPET recycled material was sensitive to temperature, showing obvious shear thinning behavior, and the composite viscosity decreased more obviously above 270 ℃. The zero shear viscosity η₀ was obtained by extrapolation by the Cross method, the activation energy of viscosity was further calculated according to Arrhenius, and the ΔE_η0 was 241.29 kJ/mol, which had a significant effect on the untangling of the segments. The rheological characteristics of Re-fPET recycled powder were studied using a torque rheometer. The torque value of Re-fPET resin decreased rapidly and the equilibrium time was shorter above 270 ℃. The torque value after equilibrium was smaller, the melt characteristic viscosity decreased significantly, and the material was significantly degraded, which was not conducive to processing.