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PET/IPDI粘合剂体系的固化催化剂研究

固体火箭技术(2014)

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Abstract
采用傅里叶红外变换衰减全反射(FTIR-ATR)光谱技术,研究了乙酰丙酮铁(Fe(AA)3),三苯基铋(TPB),环烷酸镁(CH),二月桂酸二丁基锡(T12)和三乙胺(TEA)5类催化剂对PET/IPDI粘合剂体系固化催化性能的影响.实验结果表明,CH和T12在PET/IPDI粘合剂体系中催化活性较高,使固化速率过快,同时TEA易挥发,都难以满足工艺要求;Fe(AA)3和TPB是PET/IPDI粘合剂体系较理想的催化剂,PET/IPDI/0.1%TPB体系在70℃时,反应5h后具有后期加速现象,其前期活化能是55.67 kJ/mol,后期活化能是129.46 kJ/mol;Fe(AA)3的活性随HAA含量的增加而降低,在Fe(AA)3∶HAA=0.01%∶0.09%时,固化催化效果较优;PET/IPDI/0.01%Fe(AA)3-0.09%HAA体系反应活化能为22.78 kJ/mol.更多还原
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Key words
ipdi binder system,catalyzer,pet
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