TY - SER AU - Luo, Shan-Guo AU - Tan, Hui-Min AU - Wu, Yi-Jie TI - Catalytic Mechanisms of Triphenyl Bismuth, Dibutyltin Dilaurate, and Their Combination in Polyurethane- Forming Reaction KW - Catalytic Mechanism KW - Urethane Polymer KW - Nmr Spectroscopy ER -