CHINESE JOURNAL OF ENERGETIC MATERIALS
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双基球扁药中的钝感剂迁移现象及其对燃烧性能的影响
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1.南京理工大学化工学院, 江苏 南京 210094;2.南京理工大学特种能源材料教育部重点实验室, 江苏 南京 210094

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国家自然科学基金资助(2140316)


Migration Phenomenon of Deterrent in Double-base Oblate Spherical Propellant and Its Influence on Combustion Performance
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1.School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;2.Key Laboratory of Special Energy Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China

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    摘要:

    为研究双基球扁药贮存过程中钝感剂的迁移现象,采用显微拉曼技术,表征了经加速老化后小分子钝感剂邻苯二甲酸二丁酯(DBP)和高分子钝感剂聚新戊二醇己二酸酯(NA)在双基球扁药中的浓度分布状态;并利用密闭爆发器试验,测试了双基球扁药的燃烧性能。结果表明,在由表及里的一维方向上,钝感剂DBP、NA的浓度呈指数规律变化,符合Fick第二扩散定律;加速老化过程中,在双基球扁药中DBP的迁移是双向的,钝感剂分布的浓度梯度会逐渐降低,扩散深度增加,浓度峰值位置向内偏移,双基球扁药燃烧渐增性能也随之下降;高温会加剧钝感剂的迁移现象,65,75,85 ℃高温条件下老化10天的球扁药样品,其燃烧渐增性特征值分别为1.3351、1.2917、1.1888;随着温度的升高,双基球扁药的燃烧渐增性能下降幅度也随之加大;而在相同条件下,NA较DBP具有更好的抗迁移特性。

    Abstract:

    In order to study the migration phenomenon of deterrent in double-base oblate spherical propellant during storage, micro-Roman technique was used to characterize the concentration distribution of dibutyl phthalate(DBP) and poly (neopentyl glycol adipate)(NA) in double-base oblate spherical propellant after accelerated aging; and the combustion performance of double-base oblate spherical propellant was tested by the closed bomb test. Results show that the concentration of DBP and NA changed exponentially from the surface to the inside in one-dimensional direction, which conformed to Fick"s second diffusion law. During the accelerated aging process, the migration of DBP in double-base oblate spherical propellant was bidirectional, the concentration gradient of deterrent decreased gradually, the diffusion depth increased, the peak position of concentration shifted inward, and the combustion performance of double-base oblate spherical propellant also gradually decreased. High temperature would aggravate the migration of deterrent. The progressive combustion characteristic values of double-base oblate spherical propellant samples aged at 65 ℃,75 ℃ and 85 ℃ for 10 days were 1.3351, 1.2917 and 1.1888, respectively. With the increase of temperature, the progressive combustion characteristic values of double-base oblate spherical propellant decreased. Under the same aging conditions, the anti-migration characteristics of NA was higher than that of DBP.

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引用本文

张勇,丁亚军,肖忠良.双基球扁药中的钝感剂迁移现象及其对燃烧性能的影响[J].含能材料,2021,29(3):220-227. DOI:10.11943/CJEM2020242.
ZHANG Yong, DING Ya-jun, XIAO Zhong-liang. Migration Phenomenon of Deterrent in Double-base Oblate Spherical Propellant and Its Influence on Combustion Performance[J]. Chinese Journal of Energetic Materials, 2021, 29(3):220-227. DOI:10.11943/CJEM2020242.

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  • 收稿日期: 2020-08-31
  • 最后修改日期: 2021-01-20
  • 录用日期: 2020-12-11
  • 在线发布日期: 2021-01-20
  • 出版日期: 2021-03-25