Polymer concentration and fibre diameter

2 Relationship between polymer concentration, solution viscosity and diameter of electrospun polyacrylonitrile (PAN) fibres. 

The relationship between the solution viscosity and the polymer concentration is highly dependent on the nature of the polymer (e.g. structure and molecular weight) and the iniermolecular interactions within the polymer 

As the polymer concentration increases, the solution viscosity also increases. The jet under the higher viscoelastic force is more difficult to break into 

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