OU Ya-peng， CHANG Shuang-jun， ZHANG Bai-lei
(School of Chemical and Environmental Engineering, North University of China, Taiyuan 030051, China)
Abstract： Catalysis effect of triphenyl bismuth (TPB) on kinetics of hydroxyl terminated polybutadiene-toluene diisocyanate (HTPB-TDI) curing reaction was studied by non-isothermal differential scanning calorimetry (DSC). The characteristic temperature of curing system was measured for calculating kinetic parameters and establishing curing reaction kinetic equations. The results show that activation energy (Ea) of uncatalyzed HTPB-TDI curing system is 51.29 kJ·mol-1, and TPB decreases Ea to 46.43 kJ·mol-1. Catalyst lowers reaction temperature and shortens curing time through decreasing activation energy of curing reaction and accelerating reaction rate. TPB can increase the reaction rate at 27 ℃ to the value of uncatalyzed system at 80 ℃. The catalytic activity reaches the maximum when concentration is 0.5%.
Key words： hydroxyl-terminated polybutadiene (HTPB)； catalyst； thermal analysis； curing reaction kinetics
CLD number： V512 Document code： A
Article ID： 1674-8042(2014)04-0089-04 doi： 10.3969/j.issn.1674-8042.2014.04.017
References
［1］ WANG Jing-yu, AN Cong-wei, LI Gang, et al. Preparation and performances of castable HTPB/CL-20 booster explosives. Propellants Explos Pyrotech, 2011, 36(1): 34-41.
［2］ Kumar A S, Rao V B, Sinha R K, et al. Evaluation of plastic bonded explosive (PBX) formulations based on RDX, aluminum, and HTPB for underwater applications. Propellants Explos Pyrotech, 2010, 35: 359-364.
［3］ Kumar-Nanda J, Ramakrishna P A. Development of AP/HTPB based fuel-rich propellant for solid propellant ramjet. In: Proceedings of the 49th AIAA/ASME/SAE/ASEE Joint Propulsion Conferences, 2013: 4149-4171.
［4］ Thibieroz B, Lecume S, Bigot Y. Development and characterization of PBX cast at ambient temperature. Insensitive In: Proceedings of Munitions and Energetic Materials Technology Symposium, 2001: 531-542.
［5］ Korah-Bina C, Kannan K G, Ninan K N. DSC study on the effect of isocyanates and catalysts on the HTPB cure reaction. Journal of Thermal Analysis and Calorimetry, 2004, 78(3): 753-760.
［6］ Volkova E R, Tereshatov V V, Karmanov V I. Influence of the concentration of iron(III) tris(acetylacetonate) used as urethane formation catalyst on the structure and properties of cold-cure polyurethanes. Russian Journal of Applied Chemistry, 2011, 84(8): 1414-1417.
［7］ CHANG Shuang-jun, YANG Xue-qin, ZHAO Lu-kui. Catalysis effect on curing catalysis of HTPB-IPDI binder system. Modern Chemical Industry, 2011, 3: 215-218.
［8］ ZHOU Zhi-hua, LIU Wei, CUI Guang-hui. Study on effects of bis(hydroxymethyl) ferrocene in HTPB binder systems. Chemical Propellants & Polymeric Materials, 2013, 11(4): 66-68.
［9］ LU Guo-lin, XIA Qiang, DU Juan. Catalysis effect on TPB on the cure of HTPB-based high burning rate propellant. Chinese Journal of Energetic Materials, 1999, 7(2): 60-66.
［10］ Singh M, Kanungo B K, Bansal T K. Kinetic studies on curing of hydroxy-terminated polybutadiene prepolymer-based polyurethane networks. Journal of Applied Polymer Science, 2002, 85(4): 842-846.
［11］ CHEN Chun-yan, WANG Xiao-feng, GAO Li-long, et al. Effect of HTPB with different molecular weights on curing kinetics of HTPB/TDI system. Chinese Journal of Energetic Materials, 2013, 21(6): 771-776.
TPB对HTPB-TDI固化反应的影响
欧亚鹏， 常双君， 张百磊
（中北大学 化工与环境学院， 山西 太原 030051）
摘要:采用非等温示差扫描量热法(DSC)研究了三苯基铋(TPB)对HTPB-TDI体系固化反应动力学的影响。 测定了其固化峰温， 以Kissinger法和Crane法计算其活化能等动力学参数， 列出了固化反应动力学方程。 结果表明， 未加催化剂时活化能为51.29 kJ/mol， 加入TPB后活化能降至46.43 kJ/mol。 因此， TPB能有效地降低固化反应的活化能， 加快反应速率， 降低反应温度， 缩短固化时间， 并使固化体系在27 ℃时的反应速率达到未加催化剂时80 ℃的值， 当催化剂浓度为0.5%时， 催化活性达到最大。
关键词:端羟基聚丁二烯（HTPB）； 催化； 热分析； 固化反应动力学
引用格式：OU Ya-peng， CHANG Shuang-jun， ZHANG Bai-lei. Effect of TPB on curing reaction of HTPB-TDI. Journal of Measurement Science and Instrumentation, 2014, 5(4): 89-92. ［doi: 10.3969/j.issn.1674-8042.2014.04.017］
[full text view]
