BAMO/AMMO三嵌段共聚物的合成、表征及热分解动力学  

Synthesis,Characterization and Thermal Decomposition Kinetics of BAMO/AMMO Tri-block Copolymer

作　　者：张弛[1] 罗运军[1] 李晓萌[1] 

机构地区：[1]北京理工大学材料科学与工程学院,北京100081

出　　处：《火炸药学报》2010年第6期11-15,共5页Chinese Journal of Explosives & Propellants

基　　金：总装预研项目资助(40406030101-5)

摘　　要：以三氟化硼.乙醚/1,4丁二醇作引发体系,利用阳离子开环共聚合的方法合成出3,3′-双叠氮甲基环氧丁烷/3-叠氮甲基-3′-甲基环氧丁烷(BAMO/AMMO)三嵌段共聚物。用FTIR、1HNMR和GPC对共聚物的结构和相对分子质量进行了表征,用DSC测定了共聚物的玻璃化转变温度。结果表明,合成的BAMO/AMMO三嵌段共聚物的相对分子质量可控、且分布窄,并具有含能热塑性弹性体的性质。同时用Vyazovkin的非线性无模型函数方法研究其热分解动力学,得到叠氮基团的分解活化能约为150kJ/mol。三嵌段共聚物在叠氮基团分解之后形成了交联网络结构。3,3′-Bisazidomethyloxetane/3-azidomethyl-3′-methyloxetane（BAMO/AMMO） tri-block copolymer was synthesized by cationic ring opening polymerization using BF3·Et2O/1,4-butanediol as initiating system.Structural analysis and molecular weight characterization of the copolymer were carried out through FTIR,1 H NMR and GPC.Glass transition temperature was measured by DSC.The results show that molecular weight of BAMO/AMMO tri-block copolymer is controllable and molecular weight distribution is relatively narrow.The synthesized copolymer exhibits the characteristics of an energetic thermoplastic elastomer.The kinetic analysis of thermal decomposition reaction was performed by Vyazovkin′s nonlinear model-free method,which suggests that the activation energy of azide group is around 150 kJ/mol.The tri-block copolymer should form a crosslinking network structure after the decomposition of azide group.

关 键 词：有机合成 含能热塑性弹性体 BAMO/AMMO三嵌段共聚物 阳离子开环聚合 热分解动力学 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]