RDX/PEG悬浮液的流变性能

为获取RDX对固体火箭推进剂药浆流变性能的影响规律,采用稳态和动态流变学方法研究了RDX在硝酸酯增塑的聚乙二醇黏合剂体系中的流变特性、黏弹性及温度对悬浮液流变性能的影响.结果表明,随RDX含量的增加,颗粒间相互作用增强,从而导致悬浮液体系假塑性程度升高和损耗模量频率谱偏离线性程度增大.在RDX(I)悬浮液中RDX存在临界体积分数,且在硝酸酯增塑的聚乙二醇黏合剂体系中的表观黏度随温度的升高呈增加趋势,这与RDX的粒度和固-液界面相关.

Rheological Behavior of RDX/PEG Suspension

In order to obtain the effect rule of RDX on the rheological behavior of solid propellant matrix,the rheological behavior and viscoelasticity of suspension with nitrate ester plasticzed polyethylene glycol binder as matrix fluid and RDX as the dispersed phase is described and the effect of temperature on rheological performance of RDX suspension are studied by steady-state and dynamic rheology methods.The results show that the increase of pseudoplastic behavior of the suspension and deviation degree from linearity of the frequency sweep curve of loss modulus is caused by the interaction among RDX particles.RDX suspension exist the critical volume fraction,and with raising temperature,the apparent viscosity in RDX(I)/PEG suspension has a general increased tendency which is relative to RDX particle size and solid liquid interface.