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采用ＦＴＩＲ及ＮＭＲ技术研究固化催化剂、增塑剂、抗氧剂及聚醚二元醇结构对聚醚聚氨酯热氧降解过程的影响． 增塑剂邻苯二甲酸二丁酯（ＤＢＰ） 在聚醚聚氨酯热氧降解过程中起阻降作用． 而固化催化剂二月桂酸二丁基锡（ＤＢＴＤＬ） 和三苯基铋（ＴＰＢ） 对聚醚聚氨酯的热氧降解有着截然不同的影响． 以聚乙二醇（ＰＥＧ） 为聚醚二元醇的聚醚聚氨酯与环氧乙烷／ 四氢呋喃（ＥＯ／ＴＨＦ） 共聚醚聚氨酯具有相似的降解机理；ＤＢＰ增塑时ＰＥＧ 聚醚聚氨酯比共聚醚聚氨酯具有较低的热氧稳定性，而硝酸酯增塑时ＰＥＧ体系比共聚醚体系表现出较高的热氧稳定性．
The effects of curing catalysts, plasticizers, antioxidants and polyether diols on the thermo-oxidative degradation of polyether polyurethanes were investigated by FT-IR and NMR techniques. Plasticizer dibutyl phthalate (DBP) in polyether polyurethane thermo-oxidative degradation played a resistance. However, the curing catalysts dibutyltin dilaurate (DBTDL) and triphenylbismuth (TPB) have distinctly different effects on the thermo-oxidative degradation of polyether polyurethanes. Polyether polyurethanes with polyethylene glycol (PEG) as polyether diols have similar degradation mechanisms with ethylene oxide / tetrahydrofuran (EO / THF) copolyether polyurethanes; PEG polyether polyurethanes are more degradable than polyether polyurethanes Polyurethane has lower thermo-oxidative stability, whereas PEG-based systems exhibit higher thermo-oxidative stability than copolyether systems when plasticized with nitrates.