Size-Exclusion Chromatography (SEC) also known as Gel Permeation Chromatography (GPC) is a liquid chromatography technique, which separates molecules according to their size. Samples need to be dissolved first and then injected into the GPC columns, where the separation will occur. The larger the molecules, the more they will be excluded from available pores in the column packing and the earlier they will elute out of the columns.
After leaving the columns, the solution passes through a concentration detector, which in this case is Polymer Char’s IR5 MCT, and through other detectors which might be attached as well, like a Viscometer, a Light Scattering, etc.; providing additional information. All the detectors signals can be used to obtain the Molar Mass Distribution curve and associated results such as SCB or LCB.
Polymer Char performs GPC/SEC analyses for polyolefins, by using its own high temperature Instrument, the GPC-IR apparatus.
High Temperature Size Exclusion Chromatography analysis by the most modern instrument in the market: GPC-IR.