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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。
Abstract
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 0s-1 and 200s-1 were 82.7Pa·s and 1.9Pa·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.
关键词
高聚物粘结炸药
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流变
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高固含量
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表观黏度
Key words
polymer bonded explosive (PBX)
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rheology
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highly mass fraction
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apparent viscosity
HTPB/RDX/Al/DOA复合体系流变特性研究[J].
化工新型材料, 2019, 47(7): 194-196 DOI:
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基金资助
国家自然科学基金(11502194)
