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采用稳态剪切实验和动态剪切实验 ,研究了聚合物的摩尔质量及其溶液的质量浓度对于溶液粘弹性的影响 .结果表明 ,聚合物的摩尔质量越大 ,溶液的质量浓度越高 ,动态曲线中相应的储存模量和损耗模量也增加 ,溶液的松弛时间也越长 ;稳态剪切曲线中 ,溶液的第 1法向应力差随剪切速率的增加而增大 ;在低频率 (或低剪切速率 )下 ,动态剪切测量的复合粘度与稳态剪切测量的剪切粘度是相等的 .
The steady-state shear experiments and dynamic shear experiments were carried out to study the influence of the molar mass of the polymer and the concentration of the solution on the viscoelasticity of the solution.The results showed that the higher the molar mass of the polymer, the higher the mass concentration of the solution, The corresponding storage modulus and loss modulus of the dynamic curve also increase, the longer the relaxation time of the solution; the steady-state shear curve, the solution of the first normal stress difference increases with the shear rate increases in the low The shear viscosity measured by dynamic shear is equal to the shear viscosity measured by steady shear at frequency (or low shear rate).