More material is wasted in polymer powder bed fusion (PBF) than other additive manufacturing (AM) processes because the material properties change with continued use. The polyamides typically used in PBF suffer from changing molecular weight due to chain-extension and chain-scission reactions during printing. The authors have been exploring a PBF-grade poly(phenylene sulfide) (PPS), a high-temperature polymer exhibiting high solvent resistance, specific strength, radiation resistance, and wear resistance. The goal of this study is to explore the recyclability of PPS powder by quantifying material property changes through a controlled aging study at two, process-relevant temperatures (200 °C and 278 °C) for up to 300 hours. Investigated properties correspond to powder recoating (e.g., Hausner ratio and avalanche angle), thermal transitions (e.g., Tm and ΔHm), flow behavior (e.g., melt flow index), and printed properties (e.g., E'). The results indicate greater changes in molecular weight and molecular architecture with increasing temperature and time.