1. What is Volume Occupied by Polymer Molecules?

Volume Occupied by Polymer Molecules is defined as the space inherently occupied by the polymer molecules present in the system. It represents the actual volume taken up by the polymer chains themselves, excluding any empty spaces or voids in the material.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( V_{occ} \) — Volume Occupied by Polymer Molecules (m³)
• \( V_{tot} \) — Total Volume of Polymer Sample (m³)
• \( V_f \) — Free Volume (empty spaces between polymer chains) (m³)

Explanation: This formula calculates the actual volume occupied by polymer molecules by subtracting the free volume (empty spaces) from the total volume of the polymer sample.

3. Importance of Polymer Volume Calculation

Details: Calculating the volume occupied by polymer molecules is crucial for understanding material density, porosity, and mechanical properties. It helps in characterizing polymer morphology and predicting material behavior under different conditions.

4. Using the Calculator

Tips: Enter the total volume of the polymer sample and the free volume in cubic meters. Both values must be positive numbers, and the free volume cannot exceed the total volume.

5. Frequently Asked Questions (FAQ)

Q1: What is free volume in polymers?
A: Free volume is the empty space between entangled polymer chains that arises from the molecular structure and packing of polymer molecules.

Q2: How is free volume measured experimentally?
A: Free volume can be measured using techniques such as positron annihilation lifetime spectroscopy (PALS), density measurements, or gas permeation studies.

Q3: Why is understanding occupied volume important?
A: The volume occupied by polymer molecules affects material properties like density, thermal expansion, mechanical strength, and permeability to gases and liquids.

Q4: Does temperature affect the occupied volume?
A: Yes, temperature affects both the occupied volume and free volume. As temperature increases, polymer chains gain mobility, potentially changing both parameters.

Q5: Can this calculation be used for all polymer types?
A: This basic calculation applies to all polymers, but the relationship between occupied volume and material properties varies significantly between different polymer types and structures.