Degree of Polymerization (DP) Calculator
Compute the number-average degree of polymerization from the number-average molecular weight of a polymer and the molecular weight of its repeat unit.
How to Use the Degree of Polymerization (DP) Calculator
- Enter the polymer number-average molecular weight Mₙ.
- Enter the molecular weight of the repeat unit.
- Click Calculate to see the degree of polymerisation.
Anwendungsfälle
- •Polymer characterisation.
- •Quality control in plastic manufacturing.
- •Materials science homework.
Formel
DP = Mₙ / M_monomer, where Mₙ is the number-average molecular weight of the polymer and M_monomer is the molar mass of the repeat unit.
Häufig gestellte Fragen
Why number-average?
DP based on Mₙ counts each chain once regardless of length, so it is the arithmetic mean number of repeat units per chain.
How does DP relate to degree of polymerisation measured by GPC?
GPC typically reports both Mₙ and Mw. Use Mₙ for number-average DP, Mw for weight-average DP, and their ratio Đ as the dispersity.