Efective rheology mapping for characterizing polymer solutions utilizing ultrasonic spinning rheometry
Efective rheology mapping for characterizing polymer solutions utilizing ultrasonic spinning rheometry
复制标题
利用超声波纺丝流变测定法表征聚合物溶液的有效流变图
DOI：
10.1007/s00348-022-03382-0
复制
发表时间：
2022
影响因子：
2.4
通讯作者：
Y.Murai
中科院分区：
文献类型：
--
作者：
K.Ohie;T.Yoshida;Y.Tasaka;Y.Murai
我们提出了一个实用的地图表示称为流变映射的粘弹性施加的剪切变形和剪切时间尺度表示的振荡频率，利用超声纺丝流变仪，它具有良好的适用性，以各种各样的聚合物溶液的依赖性进行全面评估。流变映射被施加到两种典型的聚合物溶液。一种是羧甲基纤维素（CMC）水溶液，一种众所周知的粘性和剪切稀化流体。另一类是聚丙烯酰胺（PAM）水溶液，一般认为它是一种粘弹性流体，但它的粘弹性很难用标准的转矩型流变仪来评价。溶液的流变图显示出显著的流变特性。CMC和PAM溶液的粘弹性从弹性到粘性变化很大，这取决于所施加的剪切速率、应变和振荡频率。映射还揭示了溶液的粘度的明确依赖性：CMC溶液对剪切速率和PAM溶液对剪切应变。这些结果为其他报告中的发现提供了定量支持，这些报告将这些宏观特性与聚合物线圈的微观动力学联系起来。
We propose a practical map representation termed rheology mapping for comprehensively evaluating the dependence of viscoelasticity on applied shear deformation and shear timescale represented by oscillation frequency, utilizing ultrasonic spinning rheometry, which has excellent applicability to a wide variety of polymer solutions. The rheology mapping was applied to two typical kinds of polymer solutions. One is carboxymethyl cellulose (CMC) aqueous solution, a well-known viscous and shear thinning fluid. The other is polyacrylamide (PAM) aqueous solution generally considered as a viscoelastic fluid while its viscoelasticity is difficult to be evaluated by a standard torque-type rheometer. The rheology mapping for the solutions showed notable rheological properties. The viscoelasticity of both the CMC and PAM solutions vary widely from elastic to viscous, depending on the applied shear rate, strain, and oscillation frequency. The mapping also revealed the clear dependence of the viscosity of the solutions: the CMC solutions on the shear rate and the PAM solutions on the shear strain. These results provide quantitative support of findings in other reports associating these macroscopic properties with the microscopic dynamics of polymer coils.Graphical Abstract