【摘要】 以丙烯酸偕二硝基丙酯(DNPA)和乙酸乙烯酯(VAc)为单体,偶氮二异丁腈为引发剂,乙酸乙酯为溶剂,合成了含能粘结剂DNPA-VAc共聚物。讨论了单体配比、引发剂用量和反应时间对共聚反应的影响。采用FT-IR、1HNMR、DSC、TG等方法研究了DNPA-VAc共聚物的结构和性能。研究结果表明,DNPA和VAc的投料摩尔比为31,在80℃下反应8 h,获得共聚物产率为72%。DNPA-VAc共聚物的玻璃化温度是59.7℃,热分解峰温为259.1℃,放气量1.7 mL·g-1,真空安定性好,与RDX和HMX相容,是较稳定的聚合物。更多还原

【Abstract】 The 2,2-dinitropropyl acrylate-vinyl acetate( DN PA-VAc) copolymer was synthesized by the free radical polymerization in ethyl acetate using azobisiosbutyronitrile as initiator. The effects of molar ratio of monomers,initiator concentration and time on copolymerization were investigated. The structure and properties of DNPA-VAc copolymer were also characterized by FTIR,1HNMR,DSC and TG measurements. Results show that the copolymer is obtained with the yield of 72% under conditions of DN PA and VAc molar ratio of 3: 1 at 80℃ within 8 hours. The glass transition temperature and thermal decomposition peak temperature of the DNPA-VAc copolymer is 59. 7 ℃and 259. 1 ℃. It is compatible with RDX and HMX,and thermal stable.更多还原