CAJ | 학술논문

采用MiniLab微型双螺杆流变仪，对高固含量的硼粉/端羟基聚丁二烯（ B/HTPB）、团聚硼/端羟基聚丁二烯（TB/HTPB）混合体系高剪切速率范围时的粘-切依赖性、粘-温依赖性及粘流活化能进行分析研究。结果表明，剪切速率分别为70～142、142～320、320～533 s-1时，B/HTPB体系为胀流体，随剪切速率增大而胀流性减弱，流动指数分别为2．03、1．31、1．10；温度由25℃升至40℃时，B/HTPB体系粘度急剧升高，在剪切速率为142～320 s-1时为Herschel-Bulkley流体，剪切速率为70～142 s-1和320～533 s-1时流动方程则符合Ostwald-de Wale幂律方程。对于TB/HTPB体系，70～320 s-1时，其为胀流体，而剪切速率达到320～533 s-1时，体系则呈牛顿流体；与B/HTPB相反，体系粘度随温度升高而减小；体系恒切速率活化能随剪切速率增大而减小，恒切应力活化能恒定不变，约为0．286 kJ/mol；相同测试条件下，TB/HTPB体系粘度较B/HTPB体系大大降低；与B/HTPB体系相同，在剪切速率为142～320 s-1时，TB/HTPB体系也为Herschel-Bulkley流体，在剪切速率为70～142 s-1和320～533 s-1时，流动方程符合Ostwald-de Wale幂律方程。
채용MiniLab미형쌍라간류변의，대고고함량적붕분/단간기취정이희（ B/HTPB）、단취붕/단간기취정이희（TB/HTPB）혼합체계고전절속솔범위시적점-절의뢰성、점-온의뢰성급점류활화능진행분석연구。결과표명，전절속솔분별위70～142、142～320、320～533 s-1시，B/HTPB체계위창류체，수전절속솔증대이창류성감약，류동지수분별위2．03、1．31、1．10；온도유25℃승지40℃시，B/HTPB체계점도급극승고，재전절속솔위142～320 s-1시위Herschel-Bulkley류체，전절속솔위70～142 s-1화320～533 s-1시류동방정칙부합Ostwald-de Wale멱률방정。대우TB/HTPB체계，70～320 s-1시，기위창류체，이전절속솔체도320～533 s-1시，체계칙정우돈류체；여B/HTPB상반，체계점도수온도승고이감소；체계항절속솔활화능수전절속솔증대이감소，항절응력활화능항정불변，약위0．286 kJ/mol；상동측시조건하，TB/HTPB체계점도교B/HTPB체계대대강저；여B/HTPB체계상동，재전절속솔위142～320 s-1시，TB/HTPB체계야위Herschel-Bulkley류체，재전절속솔위70～142 s-1화320～533 s-1시，류동방정부합Ostwald-de Wale멱률방정。
The rheological properties of HTPB filled with boron powder/ agglomerated boron particles were carefully investiga-ted with MiniLab micro-rheology compounder. The dependences of temperature and shear rate on viscosity of B ( TB)/HTPB slur-ries were obtained and the viscous flow activation energy was analyzed. The results show that B/HTPB slurry presents shear-thicken-ing property in shear-rate range of 70~142,142~320 and 320~533 s-1 ,and the flow exponent of the slurry decreases from 2.03 to 1.10 with the increasing of shear rate. The viscosity of B/HTPB rises sharply as temperature increases from 25 ℃ to 40 ℃. The rheological models of B/HTPB slurry accords with the Herschel-Bulkley Equation when the shear rate is 142~320 s-1 ,while the re-lation of shear rate with stress conforms with the Ostwald-de Wale Equation in the shear-rate range of 70~142 s-1 and 320~533 s-1 . For the sample of TB/HTPB,the slurry belongs to dilatant fluid under the shear-rate range of 70~320 s-1 and behaves as a Newtoni-an fluid when the shear-rate ranges from 320 s-1 to 533 s-1 . Contrary to B/HTPB,the viscosity of TB/HTPB decreases as the tem-perature increases. The activation energy( Eγ·η ) of TB/HTPB decreases and the activation energy( Eση) of that is kept stably at about 0.286 kJ/mol as the shear rises. Under the same conditions,the rheological property of B/HTPB slurry could be significantly im-proved by agglomerated boron. The rheological models of TB/HTPB slurry are similar to that of B/HTPB,the relation of shear rate with stress conforms with Herschel-Bulkley Equation when the shear rate is 142~320 s-1 ,while accords with Ostwald-de Wale E-quation in the shear-rate range of 70~142 s-1 and 320~533 s-1 .