| As the solid propellant in use currently, HTPB propellant and NEPE propellant are widely used in solid motor currently and in the future, just because of their mutual advantage of the performance. Therefore, research on the storage properties of the propellant is significant for understanding the storage properties, analyzing its aging mechanisms. Especially research on non-destructive testing, it will widely promote the study of aging properties.For exploring the feasibility and engineering of infrared non-destructive testing, we will focus on the series of database, software and hardware(infrared spectrometer).Solid propellant infrared nondestructive testing system is including clear interface,simple function buttons, smooth operating procedures, the system platform utilizes mathematical models to analyze a lot of testing data, create databases and calculate the corresponding fitting equations, this system can be directly used to analyze the same type of propellant test data, reduce the workload in the late; the system platform can also be used to establish a database model for propellant FTIR spectral data, this model can be repeatability in the late.In the testing and modifying procedures for the solid propellant infrared nondestructive detector, through the study of the optical fiber, crystal and mid-infrared spectral absorption characteristics, designed and fabricated an optical fiber probe, and installed those in the test equipment; testing the NEPE propellant billet that has been stored for 10.6 years in the room temperature by the infrared nondestructive detector. by comparison and analyzing, we get that test billet aging time is 12.7 years, there is an deviation with their storage time 10.6 years, according to the deviation analyzing, we can define the mathematical model, database, software and detector stability and accuracy, lay the theoretical and experimental basis for the future research.The elongation at maximal and break was decreased with he whole aging of time, the higher the temperature, the more obvious decreasing trend. The elongation at maximal and break of HTPB propellant are likely to decline to below the critical value during aging time,causing cracks that fracture HTPB propellants, The elongation at maximal and break of HTPB propellant generally falls 30 percent as the critical value for the life Estimating,According to the fitted curve can be calculated, stored 87 days at 70 ℃ has reached this critical value.There is a strong negative correlation between the elongation at maximal and break and second derivative spectra characteristic wave number 1731cm-1 peak point, The correlation coefficient was-0.65151, The eigenvalues gene group is carbonyl, the elongation at maximal and break can be quantitatively and the elongation at maximal and break characterize, fitting equation is y = 155.5963-44422.11 x. |
