The crystal structure of the title compound(E)-ethyl 2-(4-(2,4-dimethoxy benzylide-neamino)-5-(3,4,5-trimethoxyphenyl)-4H-1,2,4-triazol-3-ylthio)acetate(4,C_(24)H_(28)N_(4)O_(7)S,Mr=516.17)was synthesized and determin...The crystal structure of the title compound(E)-ethyl 2-(4-(2,4-dimethoxy benzylide-neamino)-5-(3,4,5-trimethoxyphenyl)-4H-1,2,4-triazol-3-ylthio)acetate(4,C_(24)H_(28)N_(4)O_(7)S,Mr=516.17)was synthesized and determined by X-ray single-crystal diffraction.The crystal belongs to the monoclinic system,space group P2_(1)/n with a=13.162(2),b=8.4506(13),c=22.602(4)Å,β=99.888(3)°,μ=0.183 mm^(-1),V=2476.5(7)Å^(3),Z=4,D_(c)=1.385 g/cm^(3),F(000)=1088,T=110(2)K,R=0.0426 and wR=0.1216 for 3859 observed reflections with I 2σ(Ⅰ).展开更多
Aging of a solid composite propellant containing HTPB/AP/AL was performed in order to validate the conformance of the accelerated aging data to the Arrhenius law. The main objective of the work was to examine the infl...Aging of a solid composite propellant containing HTPB/AP/AL was performed in order to validate the conformance of the accelerated aging data to the Arrhenius law. The main objective of the work was to examine the influence of the aziridine bonding agents family on the propellant aging. Aging of the prepared propellant samples was conducted as follows: 1. Four samples, one free of bonding agents, and three containing aziridine based bonding agents MAPO,HX-752, MAT4 were aged at 65°C. 2. Another four samples based on HX-752, MAT4 with different curing agents were aged at 65°C. The measured mechanical properties of the free bonding agent propellant samples were very far from the specifications and this illustrates the importance of the bonding agents in both the preparation and the aging phases.The prepared bonding agent 'MAT4' gave remarkable improvements of the mechanical properties comparing with HX-752 and MAPO. The aziridine bonding agents family inhibited the rate of decomposition of the propellant during the aging periods and supported the propellant matrix against decomposition at the elevate temperatures. Using of HMDI as curing agent gave slight better mechanical properties to the IPDI.展开更多
基金supported by the Science Foundation of the Southern Medical University for New Excellent Talents(No.B1000374)the Natural Science Foundation of Guangdong Province(No.10451051501004725)
文摘The crystal structure of the title compound(E)-ethyl 2-(4-(2,4-dimethoxy benzylide-neamino)-5-(3,4,5-trimethoxyphenyl)-4H-1,2,4-triazol-3-ylthio)acetate(4,C_(24)H_(28)N_(4)O_(7)S,Mr=516.17)was synthesized and determined by X-ray single-crystal diffraction.The crystal belongs to the monoclinic system,space group P2_(1)/n with a=13.162(2),b=8.4506(13),c=22.602(4)Å,β=99.888(3)°,μ=0.183 mm^(-1),V=2476.5(7)Å^(3),Z=4,D_(c)=1.385 g/cm^(3),F(000)=1088,T=110(2)K,R=0.0426 and wR=0.1216 for 3859 observed reflections with I 2σ(Ⅰ).
文摘Aging of a solid composite propellant containing HTPB/AP/AL was performed in order to validate the conformance of the accelerated aging data to the Arrhenius law. The main objective of the work was to examine the influence of the aziridine bonding agents family on the propellant aging. Aging of the prepared propellant samples was conducted as follows: 1. Four samples, one free of bonding agents, and three containing aziridine based bonding agents MAPO,HX-752, MAT4 were aged at 65°C. 2. Another four samples based on HX-752, MAT4 with different curing agents were aged at 65°C. The measured mechanical properties of the free bonding agent propellant samples were very far from the specifications and this illustrates the importance of the bonding agents in both the preparation and the aging phases.The prepared bonding agent 'MAT4' gave remarkable improvements of the mechanical properties comparing with HX-752 and MAPO. The aziridine bonding agents family inhibited the rate of decomposition of the propellant during the aging periods and supported the propellant matrix against decomposition at the elevate temperatures. Using of HMDI as curing agent gave slight better mechanical properties to the IPDI.
