Fractionation of polymers by composition or molar mass allows the most comprehensive approach to the bivariate distribution studies since physical fractions from the parent sample are obtained. These fractions can be afterwards analyzed by whichever technique like TREF, CRYSTAF, GPC, NMR or DSC.

The Instrument used for performing the fractionations is a Polymer Char’s PREP mc2 Instrument, which is a benchtop Instrument capable of fractionating polyolefin by composition (TREF or CRYSTAF modes) or molar mass automatically.

After the automated fractionation process performed by PREP mc2, fractions are separated from the solvent by using an external filtration system.

The obtained physical fractions can be analyzed afterwards by CRYSTAF/TREF or GPC (depending on the type of fractionation performed) to check if the fractionation conditions used were the appropriate ones.

Finally, the obtained physical fractions are sent back to the customer by courier together with a report including the fractionation conditions, the recovered amount for each fraction obtained and the corresponding CRYSTAF / TREF or GPC analysis results of each fraction.