How does GPC separate polymer molecules?

Points on GPC to separate polymer molecules:

• In Gel Permeation Chromatography (GPC), polymer molecules are separated as they pass through a porous gel column where smaller molecules enter more pores and elute later than larger molecules.
• The stationary phase consists of cross-linked polymer beads with a controlled pore size distribution that acts as a molecular sieve.
• This size-based filtration causes polymer chains to separate strictly according to their hydrodynamic volume rather than their chemical composition.

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