Understanding the alkyl effect of geminal dinitropropyl ester energetic plasticizers on hydroxyl terminated polybutadiene(HTPB):Simultaneous tuning on low temperature behavior and processability  

作　　者：Baodong Zhao Yinglei Wang Fulei Gao Yajing Liu Weixiao Liu Feng Ding 

机构地区：[1]Xi'an Modern Chemistry Research Institute,Xi'an 710065,China [2]State Key Laboratory of Fluorine&Nitrogen Chemicals,Xi'an 710065,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第2期364-371,共8页中国化学工程学报（英文版）

基　　金：financial support of the National Natural Science Foundation of China (21875185)。

摘　　要：Geminal dinitropropyl ester plasticizers(DNPEPs) possess excellent energetic performances which provide good potentials as insensitive plasticizer. In this study, we design and synthesize DNPEPs with different alkane chain parts, and systematically investigate their structure-property relationships.Results show that DNPEPs have impact sensitivities all higher than 25.2 J, thermal decomposition temperatures all higher than 254 ℃, and glass transition temperatures(T_(g)) lower than-90 ℃.Furthermore, the effects of DNPEPs as plasticizer are studied on hydroxyl terminated polybutadiene(HTPB) in detail, including the viscosity, glass transition temperatures and others. It is noteworthy that 2,2-dinitropropyl nonanoate(DNPNc) among these DNPEPs exhibits the most expected simultaneous tuning effects on both viscosity and T_(g) of HTPB systems, providing favorable potentials to replace the conventional plastizers as dioctyl sebacate(DOS) in the HTPB based propellants and explosives.

关 键 词：Molecular simulation Experimental validation Preparation Energetic plasticizer Glass transition temperature Viscosity 

分 类 号：V51[航空宇航科学与技术—航空宇航推进理论与工程] TQ560.1[化学工程—炸药化工]