The release reaction of blocked prepolymer are discussed and release temperature are determined.The IR spectra for prepolymer,blocked prepolymer and blocked prepolymer release by heating are compared.

• 探讨了封闭的预聚体的解封反应；确定了其解封温度；并用红外光谱比较了封闭前后和加热解封后的预聚体.