HTPB/RDX/Al/DOA复合体系流变特性研究
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摘要
为研究剪切速率对端羟基聚丁二烯(HTPB)/黑索金(RDX)/铝粉(Al)/己二酸二辛酯(DOA)即(HTPB/RDX/Al/DOA)复合体系流变特性的影响,在50℃和60℃、不同剪切速率条件下,对固体组分(由RDX和Al不同配合比组成)不同用量制得的HTPB/RDX/Al/DOA复合体系进行流变测量。研究表明,对固体组分用量小于60%的复合体系,流变特性表现为牛顿流体特性,随着固体组分用量的增大,零剪切速率的表观黏度依次增大,非牛顿流体特性依次增强,固体组分用量为90%制得的HTPB/RDX/Al/DOA复合体系,在60℃条件下,零剪切速率对应的表观黏度为82.7Pa·s,剪切速率为200s-1的表观黏度为1.9Pa·s。对于70%、80%、90%的HTPB/RDX/Al/DOA复合体系,存在一个黏度转变的临界剪切速率,在剪切黏度小于该临界剪切速率条件下,体系黏度不变。
In order to investigate the effects of share rate on rheological properties of HTPB/RDX/Al/DOA composities,HTPB/RDX/Al/DOA with 5 different solid content fractions of 0%,60%,70%,80% and 90% were measured under the conditions of 50℃ and 60℃ as well as different shear rates.The results showed that when the solid content of composities was less than 60%,the rheological property was similar to newtonian.The zero shear viscosity increased as increasing the solid content,and the non-newtonian property was enhanced as increasing the solid content.For example,for composite with 90% solid content,the apparent viscosity for 0 s~(-1) and 200 s~(-1) were 82.7 Pa·s and 1.9 Pa·s respectively.For highly solid content fraction materials,such as 70%,80% and 90%,there was a critical share rate that the viscosity was unchanging when the share rate was lower than the critical value.
In order to investigate the effects of share rate on rheological properties of HTPB/RDX/Al/DOA composities,HTPB/RDX/Al/DOA with 5 different solid content fractions of 0%,60%,70%,80% and 90% were measured under the conditions of 50℃ and 60℃ as well as different shear rates.The results showed that when the solid content of composities was less than 60%,the rheological property was similar to newtonian.The zero shear viscosity increased as increasing the solid content,and the non-newtonian property was enhanced as increasing the solid content.For example,for composite with 90% solid content,the apparent viscosity for 0 s~(-1) and 200 s~(-1) were 82.7 Pa·s and 1.9 Pa·s respectively.For highly solid content fraction materials,such as 70%,80% and 90%,there was a critical share rate that the viscosity was unchanging when the share rate was lower than the critical value.
引文
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