Study on the Change Rule and Characterization Method of Tensile Strength of NEPE Propellant in the Aging Process

YAN Zhi-hong1, TAO Tao2, SUI Xin1, WANG Ning-fei1

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Chinese Journal of Explosives & Propellants ›› 2020, Vol. 43 ›› Issue (预出版) : 1-6. DOI: 10.14077/ j.issn.1007-7812.202006018

Study on the Change Rule and Characterization Method of Tensile Strength of NEPE Propellant in the Aging Process

  • YAN Zhi-hong1, TAO Tao2, SUI Xin1, WANG Ning-fei1
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Abstract

To investigate the change rule and characterization method of tensile strength of nitrate ester plasticized polyether (NEPE propellant) in the aging process, the tensile test and FTIR test were carried out on the NEPE propellant subjected to accelerated aging. Tensile strength model in aging process and the correlation model between strength inflection time and aging temperature were established respectively by bimodal Gaussian fitting and logarithmic fitting. The infrared wave number highly correlated with the tensile strength of propellant was found by correlation analysis between infrared spectrum data and tensile strength data of NEPE propellant. The research results show that tensile strength of NEPE propellant fluctuates for a period of time during aging process, and then decreases rapidly. There is a logarithmic square relationship between the time of strength inflection and storage temperature. The tensile strength after the appearance of the inflection points can be quantitatively characterized by infrared spectrum of NEPE propellant. The feasibility of characterization method for tensile strength of NEPE propellants via FTIR is experimentally verified.

Key words

NEPE propellant / infrared spectrum / tensile strength

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YAN Zhi-hong1, TAO Tao2, SUI Xin1, WANG Ning-fei1. Study on the Change Rule and Characterization Method of Tensile Strength of NEPE Propellant in the Aging Process. Chinese Journal of Explosives & Propellants. 2020, 43(预出版): 1-6 https://doi.org/10.14077/ j.issn.1007-7812.202006018

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