摘要
为了获得高能量、高强度发射药,对由硝酸酯增塑的聚环氧乙烷四氢呋喃共聚醚(PET)、硝化棉(NC)、黑索今(RDX)为主要成分的发射药体系(JMZ发射药),采用材料试验机、热机械分析仪等研究了在不同温度条件发射药的压缩、冲击强度和动态力学性能,得出了PET预聚体相对分子质量和官能度、固化剂用量等对发射药力学性能的影响规律。结果表明:PET预聚体为2官能度时,随着其相对分子质量的增加,发射药冲击性能明显下降;PET预聚体为3官能度时,其相对分子质量对发射药抗冲击性能影响减小;当固化剂用量为预聚体固化所需量2.0～4.5倍时(发射药体系含20%NC),发射药的抗冲和抗压综合性能较优。采用3官能度PET预聚体及适当过量固化剂,可获得力学性能较好的JMZ发射药。
The static and dynamic mechanical properties of gun propellants containing NC, RDX and polyether-urethane PET with mixed nitrate easter as plastiezing agent （JMZ gun propellants） were tested by DMA and materials tester at different temperatures. The influence rule of prepolymers of PET and curing agent contents on mechanical properties of propellants were obtained. The results show that when molecular mass of PET prepolymer with 2 functional groups increases, impact strength of JMZ gun propellant descends. Molecular mass of PET prepolymer with 3 functional groups has litde influence on impact strength of JMZ gun propellants. Mechanical properties of JMZ gun propellants were optimized with curing agent content of about 200% - 450% quantity for curing PET prepolymer（ JMZ propellants containing 20% NC）. The results also show that contents and functionality of PET materials affect the mechanical properties of propellants, and the mechanical properties of propellants are improved by using 3 functional group polyether poitamine and appropriate molecular mass.
出处
《含能材料》
EI
CAS
CSCD
2007年第3期235-239,共5页
Chinese Journal of Energetic Materials
关键词
材料学
PET
发射药
力学性能
官能度
materials science
PET
gun propellant
mechanical property
functionality
