Literature viscosity data are reviewed in both entangled solutions and semidilute unentangled solutions, with several examples of using de Gennes’ thermal blob to rationalize observations for flexible polymers dissolved in intermediate quality solvents. Some puzzling literature data in θ-solvents are also nicely understood with two-parameter scaling upon reanalysis (where the correlation length and the tube diameter concentration dependences differ). However, some literature data seem to not be understood with this simple scheme, suggesting that our understanding of neutral polymer solution viscosity is incomplete. Lastly, combinations of experiments are suggested to better examine the concept of the thermal blob.

回顾了缠结溶液和半稀非缠结溶液中的文献粘度数据，并提供了几个使用 de Gennes 热斑点来合理化对溶解在中等质量溶剂中的柔性聚合物的观察结果的示例。 θ-溶剂中的一些令人费解的文献数据也可以通过重新分析时的双参数缩放得到很好的理解（其中相关长度和管直径浓度依赖性不同）。然而，一些文献数据似乎无法用这个简单的方案来理解，这表明我们对中性聚合物溶液粘度的理解是不完整的。最后，建议进行实验组合以更好地研究热斑点的概念。