The degradation and recovery of waste rigid polyurethane foam (RPUF) have confronted enormous challenge because of its three-dimensional network. An efficient strategy was developed for chemical recycling of high value-added aromatic polyamines and polyether polyols via selective cleavage of carbamate and urea bonds from RPUF and characterized by Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared Ray (FT-IR). The carbamate and urea bonds were readily cleaved using (NH₂)₂CO/CH₃CH₂OH as degradation system at 180 °C for 10 h. Nevertheless, the C–C bonds and C–O–C of ether linkages as framework structure remained intact in the degradation process. Eventually, the high value-added products including aromatic polyamines and polyether polyols were retrieved. A feasible mechanism for degradation was proposed based on the NMR observations.

废硬质聚氨酯泡沫（RPUF）的降解和回收由于其三维网络而面临巨大挑战。通过选择性地从RPUF裂解氨基甲酸酯和脲键，开发了一种化学回收高附加值的芳族多胺和聚醚多元醇的有效策略，并以核磁共振（NMR）和傅立叶变换红外（FT-IR）为特征。氨基甲酸酯键和脲键很容易使用（NH ₂）₂ CO / CH ₃ CH ₂裂解OH作为降解系统，在180°C下持续10 h。然而，在降解过程中，作为骨架结构的醚键的C–C键和C–OC–C保持完整。最终，获得了包括芳族多胺和聚醚多元醇在内的高附加值产品。基于NMR观察结果，提出了可行的降解机理。