Size Exclusion Chromatography (SEC)

GPC or SEC is used to determine the average molecular weight (Mn and Mw) and the polydispersity index (Mw/Mn) of a polymer material. These properties of a polymeric material have a strong influence on the material properties (physical, mechanical and processing properties). The results of a SEC measurement can therefore be useful in explaining certain physical or mechanical properties of a material specimen. Complementary to NMR and Infrared spectroscopy, SEC analysis is an excellent technique for comparing different material batches.