In polymer science, inherent viscosity is the ratio of the natural logarithm of the relative viscosity of a polymer to its mass concentration. ^[1]

Inherent viscosity is defined as ^[2]

${\displaystyle \eta _{inh}={\frac {\ln \eta _{rel}}{c}}}$

where c is the mass concentration of the polymer (g/dL) and ${\displaystyle \eta _{rel}}$ is the relative viscosity, which is defined as

${\displaystyle \eta _{rel}={\frac {\eta }{\eta _{s}}}}$

where ${\displaystyle \eta }$ is the viscosity of the solution and ${\displaystyle \eta _{s}}$ is the viscosity of the solvent.

The unit of inherent viscosity is dL/g.

References

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