Rapid Evaluation Method of Nitrate Plasticized Polyether Propellant/Liner Interface Adhesion Performance
A technology of interface bonding and plasticized polyether, which is applied in the direction of measuring devices, instruments, and mechanical devices, etc., can solve the problems of large amount of sample preparation, high price, time-consuming and laborious formulation debugging, cumbersome testing process, etc., and achieve saving The effect of detection cost, accurate evaluation and convenient operation
Active Publication Date: 2018-06-05
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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Problems solved by technology
This method is to measure the maximum tensile strength of the joint bonded rectangular specimen by uniaxial stretching at a certain temperature and tensile rate to evaluate the interface bonding quality. The disadvantages are: the amount of sample preparation is large and the price is high , formula debugging is time-consuming and laborious, the test process is cumbersome, and the test cycle is long
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[0013] The present invention is further described by the embodiments provided by the accompanying drawings below.
[0014] Nitrate plasticized polyether propellant / HTPB liner / insulation layer were used to bond rectangular specimens aged at 65°C for different times.
[0015] Step 1, determine the testing conditions: sample preparation, equipment selection, standard selection. For the determination of interface bonding strength, the sample is a joint bonding rectangular test piece; when selecting equipment, a large material testing machine is used; the testing standard is selected as QJ2038.1A-2004 Test method for interface bonding strength of solid rocket motor combustion chamber. Micro-infrared spectroscopy of the interface is measured by using the sample after the uniaxial tensile test of the rectangular piece; when the equipment is selected, a micro-infrared spectrometer is used; the detection method is carried out in a certain area in the normal direction of the propellant / ...
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The invention discloses a method for rapidly evaluating the adhesive property of interface between nitrate ester plasticized polyether propellant and a lining. The method comprises the following steps: step one, determining the detection conditions: preparing a sample, choosing equipment, and determining the standards; step two, carrying out detection: performing spectral detection, and marking the coordinate; step three, finishing performance evaluation: establishing an empirical formula, and analyzing the evaluation indexes. According to the method, a microscopic infrared spectrometer is utilized to measure the infrared spectroscopy of the area along the interface normal direction so as to obtain the diffusion layer position coordinates; then the empirical formula of diffusion layer thickness and macro-mechanical properties is established, the empirical formula can be used to evaluate the relationship between the basic formula and adhesive strength in interface adhesion, the rapid evaluation on the adhesive property of the interface between a propellant and lining can be achieved; and the provided method can be used to screen and adjust the formula of propellant / lining and evaluate the storage property of the adhesive interface. The provided method has the advantages of low labor cost, low detection fee, simple process, convenient operation, reasonable index, and accurate evaluation.
Description
technical field [0001] The invention relates to a technology for evaluating the structural integrity and storage life of a solid rocket motor, in particular to a method for quickly evaluating the interface bonding performance of a nitrate plasticized polyether propellant / lining layer. Background technique [0002] In the prior art, the key issue restricting the use of nitrate plasticized polyether propellants is the interface bonding, especially the interface bonding performance of the propellant / lining layer is a key factor determining the service life of the engine. The test method of propellant / liner interface bonding performance has formed an industry standard, that is, QJ2038.1A-2004 Test method of solid rocket motor combustion chamber interface bonding strength. This method is to measure the maximum tensile strength of the joint bonded rectangular specimen by uniaxial stretching at a certain temperature and tensile rate to evaluate the interface bonding quality. The di...
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IPC IPC(8): G01N19/04
Inventor 庞爱民杨根桑丽鹏池旭辉彭松尹华丽杜锡娟张峰涛常华朱学珍封学华
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY