NC/NG共混体系的塑化行为

推进技术 ›› 2013, Vol. 34 ›› Issue (6): 843-848.

NC/NG共混体系的塑化行为

齐晓飞¹,张晓宏¹,张伟¹,王明¹,郭昕¹,张军平²

西安近代化学研究所,陕西西安 710065;西安近代化学研究所,陕西西安 710065;西安近代化学研究所,陕西西安 710065;西安近代化学研究所,陕西西安 710065;西安近代化学研究所,陕西西安 710065;西北工业大学理学院,陕西西安 710072

发布日期:2021-08-15
作者简介:齐晓飞(1981—), 男, 硕士生, 工程师,研究领域为固体推进剂配方设计与模拟。E-mail:fayeqee@yahoo.com.cn
基金资助:
总装备部预研基金资助项目(404060301)。

Study on Plasticizing Process of NC/NG Blends

Xi’an Modern Chemistry Research Institute, Xi’an 710065, China;Xi’an Modern Chemistry Research Institute, Xi’an 710065, China;Xi’an Modern Chemistry Research Institute, Xi’an 710065, China;Xi’an Modern Chemistry Research Institute, Xi’an 710065, China;Xi’an Modern Chemistry Research Institute, Xi’an 710065, China;School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi’an 710072, China

Published:2021-08-15

摘要/Abstract

摘要： 为了解硝化纤维素(NC)/硝化甘油(NG)塑化行为的实质,用动态流变学方法和红外光谱法对其塑化行为的宏观性质表现进行测量,并在此基础上通过分子动力学模拟揭示NC在塑化过程中的微观结构变化。结果表明,NC/NG共混体系的储能模量(G′)和损耗模量(G″)随塑化时间逐渐增大,且G′逐渐接近并超过G″,二者最终趋于稳定,此过程中体系的某些与氢键有关的红外特征频率向低波数移动。分子动力学模拟表明,在NC/NG共混体系塑化过程中,NG分子的空间位阻作用使NC分子链自由体积增加；另一方面NG分子与NC分子形成的氢键替代了NC分子内氢键,使NC分子链内部作用力减弱,回转半径增大。 

关键词: 物理化学;塑化;分子动力学模拟;复合改性双基推进剂 

Abstract: In order to explore the essence of plasticizing of nitrocellulose (NC)/nitroglycerine (NG) blends, the plasticizing process of NC/NG blends was investigated by means of the dynamic rheology method and infrared spectroscopy, and the interaction between NC and NG molecular was calculated by using Molecular Dynamics simulation(MD). The results show that the storage modulus( G′) and loss modulus (G″) increase significantly, G′ and G″ increase to the maximum and level off, and then G′ is higher than G″. In the addition, the infrared characteristic frequency decreases due to change of H-bond of NC/ NG blends in plasticizing process. Besides, according to the calculation results of Molecular Dynamics simulation, it is revealed that the free volume of NC molecule is increased by the steric hindrance effect of NG molecule, and the H-bond can be formed between NG and NC molecules instead of H-bond in the individual NC molecule, thus increasing the radius of gyration of NC. 

Key words: Physical chemistry;Plasticizing process; Molecular dynamics simulation; Composite modified double-base propellant

齐晓飞,张晓宏,张伟,王明,郭昕,张军平. NC/NG共混体系的塑化行为[J]. 推进技术, 2013, 34(6): 843-848.

QI Xiao-fei¹, ZHANG Xiao-hong¹, ZHANG Wei¹, WANG Ming¹, GUO Xin¹, ZHANG Jun-ping². Study on Plasticizing Process of NC/NG Blends[J]. Journal of Propulsion Technology, 2013, 34(6): 843-848.

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