Size Exclusion Chromatography (HT-SEC)
high temperature

HT-GPC or HT-SEC is employed to determine of the average molecular weight (Mn and Mw) and the polydispersity index (Mw/Mn) of highly crystalline polymers which show low solubilities in common organic solvents at ambient temperature.

Therefore, HT-SEC is routinely applied to polyolefins including  polyethylenes (HDPE, LDPE, and LLDPE), polypropylene (PP), ethylene-Propylene (EP) copolymers, poly(ethylene-vinyl acetate) (EVA) and poly(ethylene-butyl acrylate) (EBA)).

Measurements are carried out in 1,2,4-trichlorobenzene (TCB) at 160 °C.