FirePhysChem最新文献

{"title":"Survey of burning rate measurements in small solid rocket motors","authors":"Luigi T. DeLuca ,&nbsp;Adriano Annovazzi","doi":"10.1016/j.fpc.2023.11.004","DOIUrl":"10.1016/j.fpc.2023.11.004","url":null,"abstract":"<div><p>Burning rate plays a crucial role in determining the performance of solid rocket motors (SRMs). In the traditional approach for solid propellant propulsion, technical activities regarding burning rates are developed at three different operational levels: (i) Strand burners or laboratory-scale devices in general; (ii) Small-scale motors (SSMs); And (iii) full-size or end-item rocket motors. While strand burners are extensively used for propellant development (formulation exploration, ingredients screening, performance verification, and production control) and relatively little is done experimentally at the full-size motor level (being large-scale experimentation too expensive and dangerous), a lot is usually carried out at SSM level to obtain burning rate information under motor operating conditions. In the introductory part of this work, burning rate fundamentals are recalled and burning rate measurement devices are quickly summarized. Then, a survey of subscale motors is conducted and several automated procedures to deduce burning rate from SSM testing are analyzed. Data reduction methods commonly used by leading European companies are based on the thickness-over-time (TOT) definition. Attention is dedicated to procedures used in Italy and France for quality control of the European space launchers (solid propellant boosters of Ariane family and core solid rocket motors of VEGA family). In addition, automated data reduction methods based on mass balance (MB) and often used in USA are investigated. Specific features and general trends of the tested industrial procedures are pointed out. Since for any tests the actual burning rates are unknown, results can only be compared based on the statistical quality of the deduced ballistic data. Mainly reproducibility, ease of application, and suitability for automated computer implementation are of interest to industrial users. The effects of test variability, input data quality, and data reduction methods on result reproducibility are discussed with reference to fire tests of the successful Ariane-5 solid boosters. The systematic analysis of industrial data conducted in this work suggests that improving the actual mix reproducibility and quality of experimental data is more important than perfecting the current data reduction methods. Moreover, the international trends suggest that the fundamental TOT procedures are being replaced by MB procedures or advanced TOT procedures with burning times evaluated using pressure integrals.</p></div>","PeriodicalId":100531,"journal":{"name":"FirePhysChem","volume":"4 2","pages":"Pages 146-165"},"PeriodicalIF":0.0,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667134423000573/pdfft?md5=98467abe68a30f699b8d4b5c2d84a949&pid=1-s2.0-S2667134423000573-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138625974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"HTPB propellant binder supplemented with nitro potato starch: Formulation, characterization, and thermal decomposition behavior","authors":"Mohammed Jouini,&nbsp;Amir Abdelaziz,&nbsp;Djalal Trache,&nbsp;Ahmed Fouzi Tarchoun,&nbsp;Souhil Amokrane,&nbsp;Abdelali Benzetta,&nbsp;Abderrahmane Mezroua","doi":"10.1016/j.fpc.2023.11.003","DOIUrl":"10.1016/j.fpc.2023.11.003","url":null,"abstract":"<div><p>This study conducted a detailed examination of the characteristics of hydroxyl‑terminated polybutadiene (HTPB) doped with potato starch nitrate (NPS) as a high-energy-density binder. The investigation specifically focused on evaluating the impact of NPS doping on the chemical structure, energetic attributes, and thermokinetic behavior of HTPB-NC binder systems. The findings demonstrated advantageous features, including favorable chemical compatibility, improved material density accompanied by remarkable thermal stability, substantial energy release, and high chemical reactivity. These findings contribute to the understanding of HTPB-NPS composite and offer evidence for its remarkable features, indicating promising prospects for its utilization in the development of advanced formulations for high-energy-density propellants in future applications.</p></div>","PeriodicalId":100531,"journal":{"name":"FirePhysChem","volume":"4 3","pages":"Pages 211-215"},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667134423000561/pdfft?md5=249b89f388fe70d87c34cebcd5ed774f&pid=1-s2.0-S2667134423000561-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139301605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Isomerism of nitratoalkylazoles","authors":"Lukas Bauer,&nbsp;Maximilian Benz,&nbsp;Thomas M. Klapötke,&nbsp;Tobias Lenz,&nbsp;Mohamed Mouzayek,&nbsp;Elena Reinhardt,&nbsp;Jörg Stierstorfer","doi":"10.1016/j.fpc.2023.11.002","DOIUrl":"10.1016/j.fpc.2023.11.002","url":null,"abstract":"<div><p>In the field of energetic materials, traditional materials with high toxicity or other disadvantages are mostly used. There is an urgent need for trinitrotoluene replacements (TNT), which itself is toxic and its production is problematic due to red wastewater. New materials should be safe to handle, have good performance, and be inexpensive to synthesize. Nitratoalkylazoles are known to have low melting points and good energetic properties compared to TNT. In this paper, seven energetic compounds are synthesized starting from 5-methyltetrazole, 5-hydroxymethyltetrazole and 4,5-bishydroxymethyltriazole. The nitrates are characterized in terms of their physical, chemical, and energetic properties. Of those seven compounds, five are solid, melting between 27 °C and 110 °C, and two are liquid. Methylation and hydroxyalkylation were performed and discussed extensively. The organic nitrate is introduced in the last step so that the synthesis remains safe and scalable. Correlations between the molecular geometry and the melting points are explained. Calculations indicate detonation velocities that are 6%–11% higher than those of TNT. A discussion of the effect of isomerism on the properties leads to surprising insights and should help focus and accelerate research on the replacement of TNT.</p></div>","PeriodicalId":100531,"journal":{"name":"FirePhysChem","volume":"4 3","pages":"Pages 201-210"},"PeriodicalIF":0.0,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266713442300055X/pdfft?md5=54e227eb3059c3de2de4ed1a16c66ac0&pid=1-s2.0-S266713442300055X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139302485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rheological properties and curing kinetics of GAP-based propellant slurries","authors":"Yi Wang ,&nbsp;Yana Wang ,&nbsp;Xiaolan Song ,&nbsp;Chongwei An ,&nbsp;Fengsheng Li","doi":"10.1016/j.fpc.2023.11.001","DOIUrl":"10.1016/j.fpc.2023.11.001","url":null,"abstract":"<div><p>The rheological properties and isothermal curing kinetics of the GAP/AN/HMX propellant slurries were investigated by steady rheological measurements and isothermal rheological measurements, and subsequently, the rheological model and the curing kinetics equation of the slurries were constructed, respectively. The results indicate that the GAP/AN/HMX propellant slurries are Carreau–Yasuda fluids, and the apparent viscosity of the slurries gradually decreases with the increase in shear rate and temperature. The storage modulus and loss modulus of the slurries show an \"S\" growth with the curing reaction, and the higher temperature causes a significant reduction in the time required for complete curing of the slurries. The pot-lifes of the slurries at 55 °C, 60 °C and 65 °C are 52590 s, 19820 s, 18150 s, respectively, with a noticible decrease with increasing temperature. Furthermore, the curing reaction of the slurries is viewed as an autocatalytic reaction, and the corresponding curing degrees (<em>α</em>_max) at the maximum curing rate are 0.3481 (55 °C), 0.3536 (60 °C), and 0.4420 (65 °C), respectively.</p></div>","PeriodicalId":100531,"journal":{"name":"FirePhysChem","volume":"4 1","pages":"Pages 80-86"},"PeriodicalIF":0.0,"publicationDate":"2023-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667134423000548/pdfft?md5=d54ca14a332c734d7828ae51feb885b1&pid=1-s2.0-S2667134423000548-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135455451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elaboration, spectroscopic characterization, and study of the thermal decomposition process of energetic composites based on ammonium perchlorate and dual-biopolymers","authors":"Nawel Matmat,&nbsp;Amir Abdelaziz,&nbsp;Djalal Trache,&nbsp;Ahmed Fouzi Tarchoun,&nbsp;Hani Boukeciat,&nbsp;Aziz Rahal","doi":"10.1016/j.fpc.2023.10.003","DOIUrl":"10.1016/j.fpc.2023.10.003","url":null,"abstract":"<div><p>The current study presents a successful elaboration and characterization of an innovative energetic composite based on nitrocellulose and nitrostarch (NC<img>NPS) dual-biopolymers, and ammonium perchlorate (AP). A pre-establishment of the optimal formulation of the AP@NC<img>NPS composite has been determined through a theoretical estimation of the ballistic performance via CEA-NASA software. The obtained composites were then fully characterized by FTIR, DSC, and TGA analyses. The IR-spectroscopy depicted the presence of all the characteristic groups of ester nitrates, revealing that the incorporation of AP did not alter the chemical structure of the dual-biopolymers. The thermal analysis demonstrated a mutual catalytic effect between AP and NC<img>NPS biopolymeric matrix supported by the decrease of the maximum degradation temperatures observed for all the decomposition stages of AP@NC<img>NPS composite after the incorporation of the oxidizer. The thermo-kinetic investigation, carried out using linear and non-linear isoconversional approaches (TAS, VYA/CE) demonstrated a considerable reduction in the activation energy values, highlighting, once again the role of AP in the improvement of the thermolysis process of the prepared AP@NC<img>NPS energetic composite.</p></div>","PeriodicalId":100531,"journal":{"name":"FirePhysChem","volume":"4 2","pages":"Pages 166-176"},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667134423000536/pdfft?md5=420d862cc33f8a00e83eb6d65339e940&pid=1-s2.0-S2667134423000536-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135809643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Utilizing surface modification in coating technology to enhance the efficiency of CL-20 desensitization","authors":"Weijun He,&nbsp;Yaning Li,&nbsp;Peng Bao,&nbsp;Yuanlin Fan,&nbsp;Mingshuai Xue,&nbsp;Boliang Wang","doi":"10.1016/j.fpc.2023.10.002","DOIUrl":"10.1016/j.fpc.2023.10.002","url":null,"abstract":"<div><p>To reduce the mechanical sensitivity of CL-20, this study is based on the surface modification of CL-20, and explores the effects of two preparation processes, the water solution-suspension method and the phase separation method, on the coating process of CL-20. Based on the structural characteristics of surfactants, a formulation was devised, using 2-cyanoethyltriethoxysilane (SCA2) as the surfactant and microcrystalline wax as the desensitizer. The samples underwent comprehensive characterization employing SEM, XPS, DSC, XRD, friction sensitivity testing, and impact sensitivity testing to evaluate both their structural composition and inherent properties. The results showed that the composite particles prepared using the phase separation method displayed a compact coating layer on CL-20 surfaces. Specifically, the composite particle CL-20@SCA2/Wax-P, which contained the surfactant, exhibited a thin and dense film on its surface. The proportion of -NO₂ groups on the surface of the composite particles experienced a reduction of 13.12% compared with CL-20. The crystal form of CL-20 remained unchanged in four composite particles. The decomposition peak temperatures and activation energy of all four composite particles were decreased, resulting in reduced thermal stability. The critical friction sensitivity load for composite particles produced via the aqueous suspension method is 252 N, whereas for those prepared using the phase separation method, it elevates to 360 N. The characteristic drop height (H₅₀) of composite particles prepared by the phase separation method increased significantly, 34 cm for CL-20/W-P composite particles and 55 cm for CL-20@SCA2/W-P composite particles, compared with the raw CL-20. These results suggest that the utilization of SCA2 effectively modified the surface of CL-20, and the composite particles prepared using the phase separation method demonstrated a considerable reduction in mechanical sensitivity.</p></div>","PeriodicalId":100531,"journal":{"name":"FirePhysChem","volume":"4 1","pages":"Pages 72-79"},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667134423000524/pdfft?md5=f8ca5e3a53e0fb9476c2fe7772428ffb&pid=1-s2.0-S2667134423000524-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135761854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D printed different polymer fuel grains for hybrid rocket engine","authors":"Xiaodong Yu ,&nbsp;Hongsheng Yu ,&nbsp;Hongwei Gao ,&nbsp;Wei Zhang ,&nbsp;Luigi T. DeLuca ,&nbsp;Ruiqi Shen","doi":"10.1016/j.fpc.2023.10.001","DOIUrl":"10.1016/j.fpc.2023.10.001","url":null,"abstract":"<div><p>The advent of various additive manufacturing technologies, such as 3D printing, has changed the structural design and preparation process of rocket fuels. In order to investigate the combustion properties of various common polymer materials that can be additively manufactured by fused deposition, the combustion tests of hybrid rocket fuels prepared by 3D printing were carried out. These materials include polylactic acid (PLA), wood-like polylactic acid (Wood), acrylonitrile-butadiene-styrene (ABS), acrylonitrile-styrene-acrylate (ASA), copolymers of nylon 6 and nylon 6,6 (CoPA), polycarbonate-polybutylene terephthalate (PC-PBT), flame retardant polycarbonate (PC-FR) and polyethylene terephthalateco-1,4-cylclohexylenedimethylene terephthalate (PETG). Thermogravimetric-differential scanning calorimetry (TG-DSC) analysis was carried out on these materials, the printing effect of the fuel grains was observed by three-dimensional X-ray microscopy (µCT) and the combustion performance of these fuels in gaseous oxygen flow (<em>G</em>_OX) was recorded by high-speed photography at a constant pressure of 1 MPa. The results show that ASA and ABS exhibit good printing results. The regression rates of PC-PBT, PETG, ABS, ASA, CoPA and PLA are 0.792 mm/s, 0.592 mm/s, 0.536 mm/s and 0.477 mm/s, 0.368 mm/s, 0.339 mm/s <span><math><mrow><mo>(</mo><mtext>At</mtext><mspace></mspace><msub><mi>G</mi><mrow><mi>OX</mi></mrow></msub><mo>=</mo><mn>220</mn><mspace></mspace><mtext>kg</mtext><mo>/</mo><mrow><mo>(</mo><msup><mrow><mrow><mi>m</mi></mrow></mrow><mn>2</mn></msup><mo>·</mo><mrow><mi>s</mi></mrow><mo>)</mo></mrow></mrow></math></span>), respectively.</p></div>","PeriodicalId":100531,"journal":{"name":"FirePhysChem","volume":"4 2","pages":"Pages 139-145"},"PeriodicalIF":0.0,"publicationDate":"2023-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667134423000512/pdfft?md5=85306bd68c807ba4ec46226a52aeeaeb&pid=1-s2.0-S2667134423000512-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135760032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design, synthesis and curing mechanism of two novel photothermal dual-curing adhesives for propellants and explosives","authors":"Bojun Tan,&nbsp;Hongchang Mo,&nbsp;Jing Zhang,&nbsp;Yujia Wen,&nbsp;Binghui Duan,&nbsp;Xiaozhe Yang,&nbsp;Xianming Lu,&nbsp;Ning Liu","doi":"10.1016/j.fpc.2023.09.002","DOIUrl":"10.1016/j.fpc.2023.09.002","url":null,"abstract":"<div><p>Photothermal dual-curing adhesive is not only required to realize the basic curing function, but also has the characteristics of rapid setting and strong curing, which possesses a vital role in the molding speed, stability and structure integrity for 3D-printed propellants and explosives. Herein, the acrylate hydroxyl terminated polybutadiene, as novel photothermal dual-curing binders, were designed and synthesized utilizing cationic ring opening polymerization and active monomer mechanism as the strategy of photothermal dual-curing reaction. The mechanical properties and thermal stability of the photothermal dual-curing elastomers were systematically investigated. The results suggested that the target MAHTPB(Acrylate hydroxy‑terminated polybutadiene)-based adhesives could be cured rapidly within 5 s under UV light irradiation and completely cured in 1.5 h under heating conditions. Specifically, the elastomer film formed by MAHTPB-based photothermal dual-curing has a tensile strength of 4.63 MPa and an elongation of 386%, which exhibits stronger mechanical properties than the elastomer film formed by single photo- or thermal-curing. As a result, the synthesized photothermally cured adhesives have performed 3D printing experiments and achieved relatively satisfactory printing effects. Our study aims to solve the problems of short photocuring time, slow curing rate and incomplete curing for traditional photocuring, which lays a solid foundation to achieve rapid prototyping and precise performance control in 3D printing of propellants and explosives.</p></div>","PeriodicalId":100531,"journal":{"name":"FirePhysChem","volume":"4 1","pages":"Pages 63-71"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667134423000500/pdfft?md5=6c62c7c35b3a23a6ea039a29644d34de&pid=1-s2.0-S2667134423000500-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135459291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of the energetic performance of solid fuels with metal-fluoropolymer additives","authors":"Ayush Koul ,&nbsp;Aparna Ojha ,&nbsp;Prenav Vimal ,&nbsp;Yash Pal ,&nbsp;Sri Nithya Mahottamananda ,&nbsp;Subha S ,&nbsp;Djalal Trache","doi":"10.1016/j.fpc.2023.09.001","DOIUrl":"10.1016/j.fpc.2023.09.001","url":null,"abstract":"<div><p>Aluminum (Al) holds a pivotal role in augmenting the energetic potential of solid fuel formulations. Its incorporation can notably amplify the energy yield upon combustion. Nevertheless, challenges such as ignition delay and incomplete combustion have hindered its optimal utilization. In the context of hybrid rocket propulsion, where reignition and high regression rates are sought, a promising solution lies in harnessing the potential of metal-fluoropolymer combinations. This paper explores the influence of polytetrafluoroethylene (PTFE) and Viton fluoropolymer additives on the combustion and regression rates of hydroxyl‑terminated polybutadiene (HTPB)-based solid fuels loaded with nano-aluminum (nAl). To comprehensively address these objectives, binary composites of nAl-PTFE and nAl-Viton were prepared using high-energy ball-milling, and the resulting mixtures were incorporated into hydroxyl‑terminated polybutadiene (HTPB)-based fuel through a vacuum-casting technique. The ignition and combustion characteristics of the solid fuels, as well as the post-combustion products, were examined using an opposed flow burner setup to gain insights into their oxidation and combustion mechanisms. The findings demonstrate that the inclusion of PTFE and Viton in nAl has a positive impact on the ignition delay time, combustion behavior, and regression rates of the solid fuels. The HTPB-nAl-PTFE(S3) sample exhibited the shortest ignition delay time of 108 ms, outperforming the other tested samples (S1: 227 ms, S2: 182 ms, S4: 122 ms). Furthermore, the addition of nAl to pure HTPB resulted in an average regression rate of 0.3–0.6 mm/s for HTPB-nAl (S2), representing a two fold improvement compared to pure HTPB-based samples. Compared to the baseline HTPB fuel, HTPB-nAl-PTFE(S3) demonstrated a significant increase in regression rate by approximately 178%, while HTPB-nAl-Viton(S4) exhibited an increased regression rate of 122%. These results highlight the positive influence of fluoropolymers on combustion behavior, ultimately enhancing the overall performance of the fuel. Additionally, the study observed gas-phase reactions during the combustion process, including the reaction between nano-aluminum (nAl) and fluoride, the intermediate product of Al oxidation, and the decomposition products of fluoride. These reactions resulted in the faster fracture of the alumina (Al₂O₃) shell, leading to improved heat release and regression rate performance.</p></div>","PeriodicalId":100531,"journal":{"name":"FirePhysChem","volume":"4 2","pages":"Pages 131-138"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667134423000494/pdfft?md5=8525d277b7328ae668dd825da603ec97&pid=1-s2.0-S2667134423000494-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135429455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal decomposition behavior and kinetic study of nitrocellulose in presence of ternary nanothermites with different oxidizers","authors":"Slimane Bekhouche ,&nbsp;Djalal Trache ,&nbsp;Hamdane Akbi ,&nbsp;Amir Abdelaziz ,&nbsp;Ahmed Fouzi Tarchoun ,&nbsp;Hassane Boudouh","doi":"10.1016/j.fpc.2023.02.001","DOIUrl":"https://doi.org/10.1016/j.fpc.2023.02.001","url":null,"abstract":"<div><p>Nanothermites have recently attracted a great deal of interest in both military and civilian domains owing to their capability of igniting or exploding and releasing a significant quantity of heat <em>via</em> a redox reaction. In this study, three ternary nanothermites, which contain MgAl alloy as fuel and different metal oxides (M_<em>X</em>O_<em>Y</em> = CuO, NiO, TiO₂) as oxidizers, were prepared through the arrested reactive milling technique. These metastable intermolecular composites were introduced to nitrocellulose (NC), using a fast solution drying technique, to assess their catalytic behavior. The as-obtained energetic composites, namely, NC/MgAl-M_<em>X</em>O_<em>Y</em>, were scrutinized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), powder X-ray diffraction (XRD), and differential scanning calorimetry (DSC). The ignition delay time of NC/MgAl-M_<em>X</em>O_<em>Y</em> composite films was also determined, and the results revealed the positive effect of the introduction of nanothermite through the decrease of its value compared to pure NC. Using the isoconversional kinetic analysis, the Arrhenius parameters associated with the thermal decomposition of the as-obtained NC/MgAl-M_<em>X</em>O_<em>Y</em> energetic composites films were also evaluated. The findings indicated that the choice of the oxidizer within the nanothermite composition significantly influences the decomposition behavior of the NC/MgAl-M_<em>X</em>O_<em>Y</em> energetic composites. Based on the obtained results, the MgAl-CuO nanothermite provides better performance than MgAl-NiO and MgAl-TiO₂ nanoparticles.</p></div>","PeriodicalId":100531,"journal":{"name":"FirePhysChem","volume":"3 3","pages":"Pages 208-216"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50194330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}