CHINESE JOURNAL OF ENERGETIC MATERIALS
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高性能CNA的制备及其在HMX基混合炸药中的应用
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1.北京理工大学 北京市纤维素及其衍生材料工程技术研究中心, 北京 100081;2.四川北方硝化棉股份有限公司;3.山东瑞泰化工有限公司

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中国兵器北方化学工业集团公司青年科技创新专项 QKCZ-mp-2015-08中国兵器北方化学工业集团公司青年科技创新专项(QKCZ-mp-2015-08)


Preparation of High-performance CNA and Its Application in HMX-based Mixed Explosives
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1.Beijing Engineering Reaearch Center of Cellulose and Its Derivatives, Beijing Institute of Technology, Beijing 100081, China;2.Sichuan North Century Cellulose Technology Research & Development Co., Ltd, Luzhou 610063, China;3.Shandong ruitai chemical Co, LTD, Feicheng 271603, China

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    摘要:

    为改善纤维素硝酸酯(NC)的力学性能,通过对纤维素进行硝酸与醋酸酯化的化学改性,制备了含有硝酸酯基、醋酸酯基双基团修饰的纤维素混合酯-纤维素硝酸醋酸混合酯(CNA)黏合剂。采用元素分析(EA)、动态热机械分析(DMTA)、热重法(TG)、差示扫描量热法(DSC)等表征了CNA的元素含量、在丙酮、乙酸乙酯、二氯甲烷等中的溶解性、热性能及相容性。测定了CNA粘结炸药的爆速、爆热和板痕。结果表明,制备的两种CNA的含氮量分别为4.27%、8.16%;醋酸酯基团的引入,提高了纤维素混合酯的溶解性,改善了分子链的柔顺性,较高醋酸酯基含量(1.28)的CNA的热稳定性较NC提高了6~13 ℃;CNA与大部分含能材料间具有较好的相容性;CNA可用作压装混合炸药的粘合剂。CNA粘结炸药比氟橡胶粘结炸药具有更高的能量性能。

    Abstract:

    To improve the mechanical properties of nitrocellulose (NC), a cellulose mixed ester modified with double groups of nitrate and acetate groups-cellulose nitrate-acetate mixed ester (CNA) adhesive was prepared through the chemical modification of esterifying cellulose using nitric acid and acetic acid. The elemental content, solubility in acetone, ethyl acetate, dichloromethane, etc., thermal properties, and compatibility of CNA were characterized by elemental analyses (EA), dynamic mechanical thermal analysis (DMTA), thermogravimetry (TG), differential scanning calorimetry (DSC), etc.. The detonation velocity, heat of detonation and plate mark of CNA-bonded explosives were measured. Results show that the nitrogen contents of two kinds of CNAs prepared are 4.27% and 8.16%, respectively. The introduction of acetate groups increases the solubility of cellulose mixed esters and improves the flexibility of molecular chains. The thermal stability of CNA with larger acetate-group-content (1.28) is increased by 6 ℃ to 13 ℃ compared with that of NC. The compatibility between CNA and most energetic materials is good. CNA is used as a binder for press-packed mixed explosives. CNA-bonded explosives have higher energy performance than fluororubber-bonded explosives.

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引用本文

刘燕华,邵自强,张馨方,等.高性能CNA的制备及其在HMX基混合炸药中的应用[J].含能材料, 2019, 27(5):392-397. DOI:10.11943/CJEM2018131.
LIU Yan-hua, SHAO Zi-qiang, ZHANG Xin-fang, et al. Preparation of High-performance CNA and Its Application in HMX-based Mixed Explosives[J]. Chinese Journal of Energetic Materials, 2019, 27(5):392-397. DOI:10.11943/CJEM2018131.

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历史
  • 收稿日期: 2018-05-15
  • 最后修改日期: 2019-01-21
  • 录用日期: 2018-07-27
  • 在线发布日期: 2018-12-28
  • 出版日期: 2019-05-25