Method for online detection of high-energy adhesive components by near infrared spectrum
A technology of near-infrared spectroscopy and adhesives, which is applied in the direction of material analysis, measuring devices, and analysis materials through optical means, which can solve the problems of quality information feedback lag and poor timeliness, and achieve high accuracy and strong resistance to moisture interference effect of ability
Inactive Publication Date: 2020-01-17
内蒙合成化工研究所
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Problems solved by technology
The traditional analysis method of high-energy adhesive component content is liquid chromatography. This method needs to dissolve the sample, constant volume, and make a standard curve. The test time takes 6 to 8 hours, the timeliness is poor, and the feedback of quality information is seriously delayed.
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Embodiment 1
[0033] Step 1), collect and prepare the calibration set.
[0034] In this embodiment, the high-energy adhesive is composed of polyethylene glycol (PEG), nitroglycerin (NG), 1,2,4-butanetriol trinitrate (BTTN) and two small amounts of stabilizers. Through production site sampling and laboratory preparation, a total of 36 samples were collected as the calibration set. Calibration concentration, PEG content ranges from 21.39% to 35.61%, NG content ranges from 32.58% to 47.03%, and BTTN content ranges from 28.79% to 39.35%.
[0035] Step 2), determining the reference value of the component content of the calibration set sample.
[0036] The liquid chromatography method was used to determine the contents of PEG, NG and BTTN in the samples of the calibration set as reference values.
[0037] Step 3), collecting the near-infrared spectrum of the calibration set sample.
[0038] Set the reference light path and the sample light path as empty paths, and calibrate the instrument base...
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The invention relates to the field of online detection of energetic materials, in particular to a method for online detection of high-energy adhesive components by a near infrared spectrum. The methodcomprises the following steps: preparation of a calibration set, online collection of a spectrum, optimization of modelling parameters such as spectrum pretreatment, quantitative wave band and main factor number, and establishment of a corresponding relationship between the contents of the high-energy adhesive components and the near infrared spectrum, that is, a quantitative correction model. According to the method provided by the invention, the online correction of the near infrared spectrum of the high-energy adhesive components on a production line is realized by a liquid transmission optical fiber probe. The method has the advantages of high test speed, high reliability and environmental protection or the like. The invention provides an online monitoring means for the production ofhigh-energy adhesives, the deviations in the contents of product components can be discovered in time, a basis is provided for taking corrective measures, and the fraction defective is greatly reduced.
Description
technical field [0001] The invention relates to the field of on-line detection of energetic materials, in particular to a method for on-line detection of high-energy adhesive components by near-infrared spectroscopy. Background technique [0002] The high-energy binder is the binder premix of NEPE high-energy propellants, mainly composed of polyether binders, nitrate plasticizers and a small amount of stabilizer, and is the most critical raw material for NEPE propellants. The content of each component in the high-energy binder has an important impact on the energy, combustion, and mechanical properties of NEPE propellants. Therefore, in the production of high-energy binders, it is necessary to accurately analyze the component content. At present, in the production process of high-energy adhesives, it is necessary to manually take samples from the production line and send them to the physical and chemical laboratory for analysis. According to the test results, the production ...
Claims
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IPC IPC(8): G01N21/359
CPCG01N21/359G01N21/274G01N2201/12753G01N2201/12784
Inventor 苗建波朱宏春边利锋王吉强张翠珍张宇郑晓林陈元娟秦龙
Owner 内蒙合成化工研究所