【摘要】 使用甲乙酮肟、己内酰胺及苯酚等不同的封端剂合成了一系列封端型多异氰酸酯加成物。通过DSC和TGA研究了不同封端剂和不同多元醇对封端型异氰酸酯加成物解封温度的影响。测试并比较了各种封端型异氰酸酯加成物与端羟基聚丁二烯的反应物达到凝胶所需要的时间;并探讨了封端加成物在不同聚合物多元醇中的溶解性能及封端型加成物结构与性能之间的关系。更多还原

【Abstract】 A series of blocked polyisocyanate adducts has been synthesized, while methyl ethyl ketoxime (MEKO),phenol and ε-caprolactam as blocking agent. The adducts were characterized by Fourier-transform infrared spectroscopy. The influence of different blocking agents and polyols on the deblocking temperature was studied by differential scanning calorimetry(DSC) and thermogravimetric analysis(TGA). Gel time with HTPB was tested to studied the structure-property relationship of blocked adducts. The solubility of adducts in polyols has also been studied.更多还原