FT-IR光谱法研究低毒固化剂DDI与HTPB的反应动力学  

Reaction Kinetics of Low-toxic Curing Agent DDI and HTPB by FT-IR Spectra

作　　者：李爽[1] 邓琪明 贾方娜 程晓红[2] 王爱梅[1] 贾存茹 苏薇[1] 

机构地区：[1]中国航天科技集团公司四院四十二所,湖北襄阳441003 [2]湖北文理学院低维光电材料与器件湖北省重点实验室,湖北襄阳441053

出　　处：《含能材料》2015年第7期619-623,共5页Chinese Journal of Energetic Materials

摘　　要：采用傅里叶变换红外(FT-IR)光谱法研究了二聚脂肪酸二异氰酸酯(DDI)/端羟基聚丁二烯(HTPB)体系的固化反应动力学,并与异佛尔酮二异氰酸酯(IPDI)/HTPB体系进行了比较。初步探索了DDI在HTPB推进剂中的应用。结果表明,DDI/HTPB体系的固化反应为二级反应,表观活化能为37.02 k J·mol-1,相比IPDI/HTPB体系降低了3.5 k J·mol-1,说明DDI的反应活性稍高于IPDI,反应活性适中,可作为低毒固化剂应用于HTPB推进剂中。DDI/HTPB体系推进剂具有较好的常温力学性能,抗拉强度为0.85 MPa时,最大伸长率为44.1%,可基本满足推进剂的常温力学性能要求。The curing reaction kinetics of dimeryl diisocyanate（DDI） / hydroxyl-terminated polybutadiene（HTPB） system was studied using Fourier transform infrared（FT-IR） spectra and compared with that of isophorone diisocyanate（IPDI） /HTPB system.The application of DDI in HTPB propellant was preliminary explored.Results show that the curing reaction of DDI/HTPB system appears as the second-order reaction and the apparent activation energy is 37.02 kJ· mol^-1,which decreases by 3.5 kJ·mol^-1 compared with that of IPDI /HTPB system,revealing that the reactivity of DDI is slightly higher than that of IPDI.And DDI has a moderate reactivity,which can be used as low-toxic curing agent in HTPB propellant.The DDI/HTPB system possesses better mechanical properties at room temperature with the tensile strength of 0.85 MPa,and the strain at maximum load of 44.1%.The room temperature mechanical property of DDI/HTPB system can meet the requirements of mechanical properties at room temperature basically for propellant.

关 键 词：二聚脂肪酸二异氰酸酯(DDI) FT-IR光谱 反应动力学 端羟基聚丁二烯(HTPB)推进剂 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]