Polymer viscosity refers to the viscosity of polymers (such as polymer materials), usually expressed in Pascal seconds (Pa · s) or Newton seconds per square meter (Ns/m ²). Polymer viscosity is usually affected by factors such as molecular weight, concentration, solvent and temperature. The measurement of polymer viscosity is important for the preparation and application of polymer solutions, coatings, resins and polymer materials, as it affects their processing performance and final performance characteristics.