【摘要】 讨论了三种封闭剂不同加量、温度和时间对聚氨酯预聚体封闭反应的影响。对封闭前后和加热解封后的红外图谱作了比较。测定了封闭与不封闭聚氨酯固化后的性能。更多还原

【Abstract】 The effects of the amounts of three blocking agents,temperature and time on blocking reaction for prepolymer are discussed. The IR spectra for prepolymer, blocked prepolymer and blocked prepolymer decomposed by heating are compared. The properties of PU are determined.更多还原