Inherent viscosity

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]

[math]\displaystyle{ \eta_{inh} = \frac{\ln \eta_{rel}}{c} }[/math]

where c is the mass concentration of the polymer (g/dL) and [math]\displaystyle{ \eta_{rel} }[/math] is the relative viscosity, which is defined as

[math]\displaystyle{ \eta_{rel}= \frac{\eta}{\eta_{s}} }[/math]

where [math]\displaystyle{ \eta }[/math] is the viscosity of the solution and [math]\displaystyle{ \eta_s }[/math] is the viscosity of the solvent.

The unit of inherent viscosity is dL/g.

## References

1. ↑ "Dilute Solution Viscosity of Polymers". http://www.ptli.com/testlopedia/tests/iv-d2857.asp.
2. ↑ "IUPAC". http://goldbook.iupac.org/I03033.html.

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