TSP HPLC equipped with refactometer (Shodex)
TSP HPLC equipped with refractometer (Wyatt), MALLS(Wyatt) and Viscosimeter (Viscotek)
GPC is a separation technique which allows separating soluble polymers, resins and high molecular weight compounds on their difference in hydrodynamic volume. A solution of the polymer is introduced under high pressure on a column containing a porous stationary phase (e.g. polystyrene-divinylbenzene) from which larger molecules will elute first. Detection occurs with a refractometer or a UV detector. The resulting GPC chromatogram allows to determining the molecular weight (MW) distribution after calibration with polystyrene, polyethyleneglycol or polymethacrylates. Important parameters are Mn- , Mw- and polydispersity (Pd). Solvents which can be used as eluens are THF, DMSO and DMF.
Triple GPC uses three sequential detectors: refractometer, viscosimeter and light scattering (MALLS) which allows determining also the morphology of polymer molecules (bar, coil) together with a more absolute MW determination.
- Determination of the molecular weight distribution of soluble polymers, resins, adhesives, silicon oils.