摘要:
The phase structures and their evolution processes and affecting factors of blend systems of plasticizers ni -troglycerine (NG) ,1 ,5-diazido-3-nitrazapentane (DIANP) ,N-butyl nitroxyethyl nitramine (Bu-NENA ) ,bis(2 ,2-dinitropropyl) formal (BDNPF)/bis (2 ,2-dinitropropyl) formal acetal (BDNPA ) (designated as BDNPF /A when the mass ratio of BDNPF /BDNPA is 1 : 1) and nitrocellulose (NC) respectively were compared and studied by using a mesoscopic dynamics simulation method .The micromorphology of miscible products of four kinds of blend systems with the mass ratio of NC and plasticizer as 50/50 was compared and studied using scanning electron microscope . The results show that compared with plasticizer NG ,the plasticizers DIANP ,Bu-NENA and BDNPF/A exhibit bet-ter miscibility with NC ,and their micromorphology characteristics are in good agreement with the mesoscopic dy -namics simulation results .At 20 °C ,the phase separation for NC /BDNPA /F blend system with the mass ratio as 30/70 and NC /NG blend systems with the mass ratio as 70/30 ,60/40 ,50/50 ,40/60 and 30/70 occurs .For the NC/NG blend system with the mass ratio as 50/50 ,the miscibility of NG and NC improves with increasing the tem -perature ,and the phase separation phenomenon of the system disappeared at more than 40 °C .%采用介观动力学(MesoDyn)模拟方法对比研究了增塑剂硝化甘油(NG)、1,5-二叠氮-3-硝基氮杂环戊烷(DIANP)、N-丁基硝氧乙基硝胺(Bu-NENA)、双(2,2-二硝基丙醇)缩甲醛(BDNPF)/双(2,2-二硝基丙醇)缩乙醛(BDNPA)(BDNPF/A,两者质量比为1:1)与硝化纤维素(NC)共混体系的相结构及其演变过程和影响因素,用扫描电子显微镜对比研究了质量配比为50/50的4种NC/增塑剂共混体系混溶产物的微观形貌.结果表明,与NG相比,DIANP、Bu-NENA和BDNPF/A与NC的混溶性更好,且显微形貌特征与介观动力学模拟结果一致性较好;20°C 下,质量配比为30/70的NC/BDNPA/F共混体系和质量配比为70/30、60/40、50/50、40/60和30/70的NC/NG共混体系产生相分离;质量配比为50/50的NC/NG共混体系,NG与NC的混溶性随温度的升高而改善,40°C以上时体系的相分离现象消失.