共查询到19条相似文献,搜索用时 109 毫秒
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改性双基推进剂的最新进展——一种新型的固体火箭推进剂NEPE 总被引:4,自引:0,他引:4
为满足美国九十年代主要核威胁力量“MX”大型洲际导弹的需要,赫格力斯公司于七十年代末研制成功,八十年代初开始使用一种新型固体火箭推进剂NEPE(是英文Nitrate Ester Plasticised Polyether的缩写)。原意是硝酸酯增塑的聚醚推进剂。这种推进剂是以聚醚聚氨酯和乙酸丁酸纤维素取代交联改性双基推进剂中的硝化棉作为粘合剂,以液态硝酸酯或混合硝酸作增塑剂,连同奥克托今(HMX)、高氯酸铵(AP)和铝粉(Al)等成分组成。由于它充分发挥双基推进剂中液态含能硝酸酯增塑剂的能量特性、复合推进剂中 相似文献
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碳物质在固体推进剂中的功能及其作用机理 总被引:3,自引:0,他引:3
综述了碳黑(CB)、富勒烯烟炱(FS)、C60(Buckmister Fuller)、碳纤维(CF)及碳纳米管(CNTs)在固体推进剂催化燃烧中的作用、作用规律及作用机理。在双基系推进剂中加入碳黑和C60可富集催化剂,阻滞催化剂凝聚,使双基推进剂产生平台或麦撒效应,推进剂压力指数降低,低压下的燃速大幅度提高。碳纤维改善了推进剂燃烧表面的导热,增加了推进剂基体强度,可提高其燃速,预防复合推进剂的破裂。推进剂中的碳纤维、碳纳米管能加速含能材料的分解,提高推进剂的燃速。展望了固体推进剂中碳物质的发展方向。 相似文献
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《化学推进剂与高分子材料》1999,(4)
<正> 该高能推进剂含质量分数5%~30%氧杂环丁烷热塑弹性体含能粘合剂和质量分数7%~95%高能炸药填充物,另含4%~7%炸药增塑剂。首选的填充物有CL-20,TNAZ,RDX和它们的混合物。首选的增塑剂有TNAZ,BTTN,TMETN,TEGDN,BD-NPA/F,MeNENA,EtNENA及它们的混合物。实际上该推进剂是第一种和第二种高能推进剂的混合物,其中第一种推进剂的燃速比第二种推进剂至少快两倍。第一种推进剂是氧杂环丁烷热塑弹性体含能粘合剂和CL-20高能炸药填充物的混合物。第二种推进剂是氧杂环了烧热塑弹性体含能粘合剂和高能 相似文献
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降低固体推进剂燃速研究进展 总被引:1,自引:0,他引:1
综述了复合推进剂、硝酸酯增塑聚醚(NEPE)推进剂和改性双基推进剂在降低燃速方面的研究进展,并指出未来降低固体推进剂燃速研究的重点为向推进剂中引入含能降速剂及采用热分解温度较高且能量较高的新型含能材料。 相似文献
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下一代战术导弹固体推进剂研究进展 总被引:5,自引:0,他引:5
概括并评述了新型含能材料和以这些含能材料为主要组分的新型推进剂的研究近况,其中新型含能材料包括含能黏合剂、含能增塑剂和高能氧化剂(填料),新型推进剂包括CL-20推进剂、AND推进剂和HNF推进剂.认为以这些新型含能材料为基础的高能钝感低特征信号推进剂是下一代战术导弹固体推进剂的发展方向.附参考文献17篇. 相似文献
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固体推进剂用含能黏合剂体系研究进展 总被引:3,自引:0,他引:3
黏合剂含能化是近年来推进剂研究的热点之一,对叠氮基黏合剂和硝酸酯增塑聚醚黏合剂体系的制备、燃烧性能和能量性能进行了简要总结,并对今后黏合剂的发展做了展望。 相似文献
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Urethane rubbers find increasing application as binders for composites. Typical examples are solid propellants. The rubber networks are formed by end linking hydroxy-terminated prepolymers with tri- or higher functional isocyanates. A recent trend in solid propellant technology is the replacement of the traditional low-energy binders with “energetic” binders containing nitro, nitrato, or azido groups. Since these energetic polymers create relatively short interchain lengths between the cross-link points, the binders give notoriously poor mechanical properties. Our study demonstrates that significant improvements in the stress-strain behavior are attained with bimodal modifications of the energetic binders, that is, by blending these energetic short chains with very long chains prior to curing into rubbers. Molecular aspects of the improvement have been examined in terms of polymer types, crosslinkers, viscoelastic factors, and solid filler content. Results indicate that the improvement is primarily due to the extent of nonaffine deformation of the bimodal rubber network. 相似文献
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D. M. Badgujar M. B. Talawar V. E. Zarko P. P. Mahulikar 《Combustion, Explosion, and Shock Waves》2017,53(4):371-387
Energetic polymers containing nitro, nitrato, and azido groups release high energy during combustion and thereby increase the performance of the systems. A number of energetic polymers have been found suitable for use as binders in high-performance propellant and explosive formulations. This review describes the synthetic and application aspects of various modern energetic polymers for explosive formulations and propellants. 相似文献
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钝感推进剂研究进展及发展趋势 总被引:4,自引:0,他引:4
介绍了低易损炸药钝感机理和几种新型钝感推进剂的研究进展,总结了降低推进剂感度的技术途径及其发展趋势,认为对降低推进剂感度的含能黏合剂和真正钝感氧化剂的研制及其在推进剂中的应用将是今后研究的重点工作。 相似文献
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Makoto Kohga 《Propellants, Explosives, Pyrotechnics》2013,38(3):366-371
Polytetrahydrofuran (PTHF) is an effective binder ingredient for improving propellant performance, even though it is not an energetic material. PTHF becomes sufficiently rubbery for use as a binder when a triol material such as glycerin is added as a crosslinking modifier. The cured PTHF/glycerin binder had unsatisfactory mechanical characteristics for use as a propellant binder, so a more appropriate crosslinking modifier than glycerin needs to be found. In this study, glycerol propoxylate (GPO), with a molecular weight of 260, was used as a crosslinking modifier, and the curing behavior, tensile properties, and thermal decomposition behaviors of the PTHF binder using GPO were investigated. The PTHF/GPO blend did not solidify when the PTHF/GPO mole ratio (ξ) was greater than a certain value. The PTHF (Mn=650)/GPO blend with ξ≤5 and the PTHF (Mn=1400)/GPO blend with ξ≤3 were used as propellant binders. From the curing behaviors and tensile properties, it was found that the PTHF/GPO binders ensured optimal mixing of the propellant ingredients and casting of the uncured propellant into the rocket motor case, and the tensile properties of the binders changed more drastically with the variation in ξ than did those of the PTHF/glycerin binders. The thermal decomposition behaviors of the PTHF/GPO binders were hardly dependent on ξ and were almost identical to those of the PTHF/glycerin binders. 相似文献