Differences of thermal decomposition behaviors and combustion properties between CL-20-based propellants and HMX-based solid propellants
Abstract Differences of thermal decomposition characteristics and combustion properties between CL-20-based propellants and HMX-based propellants were researched by combination of theory and practice. Burning rates and burning rate pressure exponents of CL-20-based propellants were much higher than those of HMX-based propellants, when contents and particle sizes of CL-20 and HMX were identical. The thermal decomposition of CL-20 and CL-20-based propellants was systematically studied by comparison of HMX and HMX-based propellants. HMX melted firstly at 198.53 °C and then decomposed violently at 284.3 °C, while CL-20 only decomposed violently at 246.9 °C without any melting peak, and the heat released from decomposition of CL-20 was much higher than that of HMX. Thermal decomposition of CL-20 or HMX could be greatly enhanced by GAP. CL-20 could accelerate the high-temperature decomposition of AP, whereas the decomposition of HMX was greatly enhanced by AP. Mole ratio of [$ NO_{2} $]/[$ N_{2} $O] in decomposition gas products of CL-20 was 3.07, whereas the result for HMX was 0.43. More oxidative gases were generated for CL-20 or CL-20-based propellants. Molar reaction heat in luminescent flame zone and dark zone for CL-20-based propellants was much higher than that for HMX-based propellants, resulting in a higher burning rate for CL-20-based propellants. Value of [$ NO_{2} $]/[$ N_{2} $O] for gas-phase products of thermal decomposition of CL-20/ammonium perchlorate (AP) mixed system was also much higher than of HMX/AP mixed system, resulting in more oxidative gases, such as $ NO_{2} $, involved in the thermal decomposition and combustion of CL-20-based propellants with ammonium perchlorate, further leading to higher burning rates of CL-20-based propellants..
Medienart: |
E-Artikel |
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Erscheinungsjahr: |
2019 |
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Erschienen: |
2019 |
Enthalten in: |
Zur Gesamtaufnahme - volume:140 |
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Enthalten in: |
Journal of thermal analysis and calorimetry - 140(2019), 5 vom: 14. Nov., Seite 2529-2540 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Zhou, Shuiping [VerfasserIn] |
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Links: |
Volltext [lizenzpflichtig] |
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BKL: | |
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Themen: |
CL-20 |
doi: |
10.1007/s10973-019-09004-y |
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funding: |
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Förderinstitution / Projekttitel: |
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PPN (Katalog-ID): |
SPR039496457 |
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520 | |a Abstract Differences of thermal decomposition characteristics and combustion properties between CL-20-based propellants and HMX-based propellants were researched by combination of theory and practice. Burning rates and burning rate pressure exponents of CL-20-based propellants were much higher than those of HMX-based propellants, when contents and particle sizes of CL-20 and HMX were identical. The thermal decomposition of CL-20 and CL-20-based propellants was systematically studied by comparison of HMX and HMX-based propellants. HMX melted firstly at 198.53 °C and then decomposed violently at 284.3 °C, while CL-20 only decomposed violently at 246.9 °C without any melting peak, and the heat released from decomposition of CL-20 was much higher than that of HMX. Thermal decomposition of CL-20 or HMX could be greatly enhanced by GAP. CL-20 could accelerate the high-temperature decomposition of AP, whereas the decomposition of HMX was greatly enhanced by AP. Mole ratio of [$ NO_{2} $]/[$ N_{2} $O] in decomposition gas products of CL-20 was 3.07, whereas the result for HMX was 0.43. More oxidative gases were generated for CL-20 or CL-20-based propellants. Molar reaction heat in luminescent flame zone and dark zone for CL-20-based propellants was much higher than that for HMX-based propellants, resulting in a higher burning rate for CL-20-based propellants. Value of [$ NO_{2} $]/[$ N_{2} $O] for gas-phase products of thermal decomposition of CL-20/ammonium perchlorate (AP) mixed system was also much higher than of HMX/AP mixed system, resulting in more oxidative gases, such as $ NO_{2} $, involved in the thermal decomposition and combustion of CL-20-based propellants with ammonium perchlorate, further leading to higher burning rates of CL-20-based propellants. | ||
650 | 4 | |a CL-20 |7 (dpeaa)DE-He213 | |
650 | 4 | |a Thermal decomposition |7 (dpeaa)DE-He213 | |
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650 | 4 | |a Oxidative gases |7 (dpeaa)DE-He213 | |
700 | 1 | |a Zhou, Xiaoyang |e verfasserin |4 aut | |
700 | 1 | |a Tang, Gen |e verfasserin |4 aut | |
700 | 1 | |a Guo, Xiang |e verfasserin |4 aut | |
700 | 1 | |a Pang, Aimin |e verfasserin |4 aut | |
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