利用流变学等温测试方法研究铝对聚叠氮缩水甘油醚改性球形药固化的影响  

Research on Effect of Al on Curing Property of GAP Spherical Propellant by Rheological Isothemal Measuring Method

作　　者：何伟[1] 何利明[1] 马中亮[1] 肖忠良[1] 郭彦丽[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《兵工学报》2016年第6期1023-1029,共7页Acta Armamentarii

摘　　要：为了研究铝在聚叠氮缩水甘油醚(GAP)改性球形药固化过程中的作用,利用流变学等温测试方法研究了铝对GAP改性球形药固化动力学的影响,采用热分析动力学Sestak-Berggren模型对固化动力学参数进行求解,分别建立了含0%铝和10%铝的GAP球形药的固化动力学模型。结果表明:GAP球形药固化过程中表观活化能变化不大,在0<转化率<0.8范围内可认为表观活化能为64.8 k J/mol,加入铝后反应的表观活化能增大,为85.1 k J/mol,反应级数增加,指前因子减小,说明铝对GAP球形药的固化反应具有消极影响;模型与实验数据吻合较好,说明可利用流变学等温测试方法研究固体GAP球形药的固化过程;对0%和10%铝两个体系的黏度变化进行分析发现,铝主要影响到GAP球形药固化的第二阶段,使异氟尔酮二异氰酸酯分子上位阻较大的异氰酸酯基反应更加困难,活化能增大。In order to study the effect of AI on the curing process of glycidyl azide polymer （GAP） spher- ical propellant, the curing kinetics of GAP spherical propellant is studied by rheotogical isothermal meas- urement. Cuing parameters are obtained through Sestak-Berggren model, and the curing models of GAP spherical propellants with 0% A1 and 10% A1 are established. The results show that the apparent activa- tion energy of GAP spherical propellant during cuing is less changed in the range of 0 〈 conversion rate 〈 0.8. After adding A1, the apparent activation energy is increased to be 85.1 kJ/mol, and the reaction or- der increases. The addition of A1 also hinders the mobility of molecular chain. The model data shows a great agreement with the experimental data, indicating that the rheological isothermal measuring method can be used to investigate the curing process of GAP spherical propellant. Through the investigation on the variation of viscosity, it can be found that A1 influences the second stage of curing process by increas- ing the steric hindrance of cyanate base, resulting in the increase of activation energy.

关 键 词：兵器科学与技术 流变仪 聚叠氮缩水甘油醚 球形药 固化动力学 铝 

分 类 号：V512.3[航空宇航科学与技术—航空宇航推进理论与工程]