Intrinsic Viscosity and Degree of Polymerization Calculator

This calculator helps determine the intrinsic viscosity (η) and degree of polymerization (DP) of polymers using viscosity measurements. It is useful in polymer chemistry for characterizing polymer solutions.

Input Parameters

Calculation Results

Intrinsic Viscosity (ηsp/c):

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Degree of Polymerization (DP):

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Calculation Formula

ηsp/c = (ηsp - (ρsol - ρs)) / c

Where:
ηsp = Viscosity Average
ρs = Solvent Density
ρsol = Solution Density
c = Solution Concentration
DP = ηsp/c × Molecular Weight of Repeat Unit

Intrinsic Viscosity and Degree of Polymerization Calculator Usage Guide

Learn how to use the Intrinsic Viscosity and Degree of Polymerization Calculator and its working principles

How to Use the Calculator

  1. Enter the Viscosity Average (ηsp) of your polymer solution.
  2. Input the Solvent Density (ρs) in g/cm³.
  3. Provide the Solution Density (ρsol) in g/cm³.
  4. Enter the Solution Concentration (c) in g/dL.
  5. Click the "Calculate" button to compute the Intrinsic Viscosity and Degree of Polymerization.
  6. The Degree of Polymerization calculation assumes a fixed molecular weight of 100,000 g/mol for demonstration purposes. For accurate results, adjust this value based on your polymer's actual repeat unit molecular weight.

Understanding the Formulas

The intrinsic viscosity (ηsp/c) is calculated using the formula:

ηsp/c = (ηsp - (ρsol - ρs)) / c

Where ηsp represents the viscosity average, ρsol is the solution density, ρs is the solvent density, and c is the concentration.

The degree of polymerization (DP) is then calculated as:

DP = ηsp/c × Molecular Weight of Repeat Unit

Applications

This calculator is useful in polymer chemistry for:

  • Characterizing polymer solutions
  • Determining molecular weight of polymers
  • Studying polymer conformation and chain length
  • Quality control in polymer manufacturing