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Acta Armamentarii ›› 2014, Vol. 35 ›› Issue (7): 977-981.doi: 10.3969/j.issn.1000-1093.2014.07.006

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Research on Near-infrared Online Monitoring for Blend Uniformity of Modified Double-base Absorbent Powders

ZOU Quan, DENG Guo-dong, GUO Xiao-de, JIANG Wei, LI Feng-sheng   

  1. (National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology,
  • Received:2013-09-23 Revised:2013-09-23 Online:2014-09-05
  • Contact: ZOU Quan E-mail:quan.zou2013@yahoo.com

Abstract: The conventional way takes a long time to determine the uniformity of absorbent powders in blend procedure, which is an obstacle to automation and continuation of production process of solid propellant. Near-infrared (NIR) analysis is proposed to solve that problem. A micro NIR spectrometer is used to collect the spectra of absorbent powders that are stirred continually, and the moving block of standard deviation (MBSD) algorithm is utilized to quantitatively analyze the difference between spectra of absorbent powders. The uniformity and endpoint are presented from the standard deviation-time curve. In addition, the accuracy of NIR analysis on the collected samples is confirmed through high performance liquid chromatography (HPLC). The results show that NIR analysis is efficient, eco-friendly and safe. It is feasible to apply NIR analysis to monitor the blend uniformity of modified double-base absorbent powders online and determinate the endpoint of blend process in real-time.

Key words: ordnance science and technology, NIR, online monitoring, absorbent powder, blend uniformity, solid propellant

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