摘要
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。
Fourier transform infrared attenuated total reflection（FTIR-ATR） spectroscopy was used to study the curing catalytic properties of the catalyst of iron acetylacetonate （ Fe （AA） 3 ）, Triphenyl bismuth （ TPB）, Magnesium naphthenate （ CH ）, Dibutyltin dilaurate（T12） and Triethylamine TEA on PET/IPDI binder system.The experimental results show that：CH and T12 accelerate the curing rate of PET/IPDI binder system greatly because of the high catalyze activity, and the TEA is volatile, so they are all difficult to meet the technical requirements ; Fe （AA） ~ and TPB are effective catalyzer for the PET/IPDI binder system; PET/IPDI/0.1%TPB system would late accelerate after 5 h at 70 ℃ with the early activation energy is 55.67 kJ/mol,and the late activation energy is 129.46 kJ/mol;the activity of Fe （AA）3 decreases with increasing of the content of HAA, and the curing catalytic properties are better when Fe （AA） 3 ： HAA = 0.01% ： 0.09% ; The activation energy of PET/IPDI/0.1%Fe （AA） 3 -0.09HAA system is 22.78 k J/mol.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2014年第1期81-85,共5页
Journal of Solid Rocket Technology
