PBT-TDI体系的固化反应动力学和热力学  

Curing Reaction Kinetics and Thermodynamics of the PBT-TDI Binder System

作　　者：张利民 韦承莎 金波 彭汝芳 ZHANG Li-min;WEI Cheng-sha;JIN Bo;PENG Ru-fang(State Key Laboratory of Environment‑friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China;Institute of Chemical Materials,CAEP,Mianyang 621999,China)

机构地区：[1]西南科技大学环境友好能源材料国家重点实验室,四川绵阳621010 [2]中国工程物理研究院化工材料研究所,四川绵阳621999

出　　处：《含能材料》2022年第7期719-725,共7页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金资助(21875192)。

摘　　要：为获得3,3-双(叠氮甲基)氧杂环丁烷-四氢呋喃共聚醚(PBT)-甲苯二异氰酸酯(TDI)黏结剂体系固化反应行为规律,采用微热量热法研究了固化温度、固化比以及增塑剂对PBT-TDI体系固化反应的影响,并对PBT-TDI体系的固化反应动力学和热力学进行了研究与分析。实验结果表明:(1)固化反应温度越高、固化剂TDI含量越多,PBT-TDI体系固化反应速度越快;(2)增加增塑剂2,2-二硝基丙醇缩甲醛与2,2-二硝基丙醇缩乙醛混合物(A3)以及癸二酸二辛酯(DOS)用量会降低PBT-TDI体系的固化反应速度;(3)PBT-TDI体系的固化反应符合n级反应动力学模型,其表观活化能Ea为12.81 kJ·mol^(-1),指前因子A为1.48×10^(-2)s^(-1)。To explore the curing reaction behavior of 3,3-bis(azidomethyl)oxetane-tetrahydrofuran copolyether(PBT)and toluene diisocyanate(TDI)binder system,the effects of curing temperature,curing ratio and plasticizer on the curing reaction of PBT-TDI system were investigated by microcalorimetry,and the curing reaction kinetics and thermodynamics of PBT-TDI system were studied and analyzed. The experimental results show that:(1)the higher the curing temperature and the higher the TDI content,the faster the curing reaction;(2)increasing the amount of plasticizer bis(2,2-dinitropropyl)acetal/bis(2,2-dinitropropyl)formal(A3)and dioctyl sebacate(DOS)would reduce the curing reaction speed of the PBT-TDI system;(3)the curing reaction of the PBT-TDI system fits well with the n-th order reaction kinetic model with an activation energy of 12.81 kJ·mol(-1) and a pre-exponential factor of 1.48×10^(-2)s^(-1).

关 键 词：3 3-双(叠氮甲基)氧杂环丁烷-四氢呋喃共聚醚 固化行为 微热量热法 反应动力学 反应热力学 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]