The image above represents free volume of polymer.

To compute for free volume of polymer, two essential parameters are needed and these parameters are **specific volume (V)** and** volume of solidly packed molecules (V _{s}).**

The formula for calculating free volume of polymer:

V_{f} = V – V_{s}

Where:

V_{f} = Free Volume of Polymers

V = Specific Volume

V_{s} = Volume of Solidly Packed Molecules

Let’s solve an example;

Find the free volume of polymer when the specific volume is 30 and the volume of solidly packed molecules is 10.

This implies that;

V = Specific Volume = 30

V_{s} = Volume of Solidly Packed Molecules = 10

V_{f} = V – V_{s}

Vf = 30 – 10

Vf = 20

Therefore, the **free volume of the polymer **is **20.**

**Calculating the Specific Volume when the Free Volume of Polymer and the Volume of Solidly Packed Molecules.**

V = V_{f} + V_{s}

Where;

V = Specific Volume

V_{f} = Free Volume of Polymers

V_{s} = Volume of Solidly Packed Molecules

Let’s solve an example;

Find the specific volume when the free volume of polymer is 24 and the volume of solidly packed molecules is 12.

This implies that;

V_{f} = Free Volume of Polymers = 24

V_{s} = Volume of Solidly Packed Molecules = 12

V = V_{f} + V_{s}

V = 24 + 12

V = 36

Therefore, the **specific volume **is **36.**

Continue reading How to Calculate and Solve for Free Volume of Polymer | Polymer & Textile