卵磷脂对HTPB-苯乙烯溶液流变特性的影响

Effect of Phosphatidylcholine on the Rheological Properties of HTPB-Styrene Solution

采用黏度法考察卵磷脂对端羟基聚丁二烯(HTPB)-苯乙烯溶液流变特性的影响。以黏度变化因子C为指标,表征卵磷脂与HTPB分子间相互作用大小,通过这一方法,探讨了混合溶液体系中卵磷脂与HTPB的共混行为,同时比较了两者相对含量变化对其相互作用的影响。结果表明:随着卵磷脂含量增加,溶液的黏度随之增大,呈现出更加显著的非牛顿流体特性;而混合溶液的流动活化能(E)呈现先减小后增大的趋势,HTPB与卵磷脂分子间相互作用呈现先增大后减小的趋势。当卵磷脂质量分数增加至0.053时,C增至最大值0.165,E/R降至最小值,1004.9。

For further understanding of interaction between phosphatidylcholine and hydroxyl-terminated polybutadiene（HTPB） in styrene solution,the effect of phosphatidylcholine on the rheological properties of HTPB-styrene solution was studied by viscometric method.The viscosity changing factor（｜C｜） was used to characterize the degree of molecular interaction between phosphatidylcholine and HTPB.In this approach,the blending behavior of phosphatidylcholine and HTPB in mixed solution system was further discussed.Meanwhile,the effect of the relative contents of phosphatidylcholine and HTPB on the interaction degree was researched.Results show that the solution viscosity increases with the increasing of phosphatidylcholine.And the solution exhibits a more remarkable non-Newtonian behavior.The flow activation energy（E） first increases and then decreases,while the interaction degree between phosphatidylcholine and HTPB first decreases and then increases.｜C｜ increases to the maximum value of 0.165 and E/R decreases to the minimum value of 1004.9 as phosphatidylcholine content reaches to 0.053.