Branched Polydienes

It is well-known that branched polymers elute later in a GPC-experiment than their linear analogues with same molecular weight, due to their compact architecture. So GPC alone can only give a rough estimation of the molar mass (because of polystyrene calibration). Using light scattering during the GPC experiment to determine the molar mass of the branched structures is an effective and rapid way to get quantitative information for the rate of functionalization and the molar mass.