【摘要】 讨论了用于熔纺氨纶的封闭型聚氨酯加成物的合成,研究了反应条件对封闭剂和-NCO基反应的影响.封闭加成物在空气中贮存稳定性好,并能在适当条件下重新生成-NCO基.更多还原

【Abstract】 A series of protected polyurethane propolymer were synthesized by reacting the isocyanate groups of polyurethane prepolymer with protectors such as phenol, alcohol, amine and ester under suitable reaction conditions. Those protected polyurethane compounds are stabil-ity in the air, and free-NCO groups can be set free under suitable condition. It was proved by using Fourier transform infrared spectrome-try,themogravimetric analysis, differential scanning calorimetry, nuclear magnetic resonance spectrometry.更多还原