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Preparative Fractionation by TREF

In this fractionation method, the sample is previously crystallized and afterwards fractions are obtained by programming a heating temperature profile in steps to get the desired cuts.

At each temperature step, part of the crystallized polymer will be dissolved while the rest will remain precipitated. The dissolved part is what will be filtrated and collected and will correspond to each temperature cut fraction.

This method is the most used in fractionation by composition as it is the most predictable process based on preliminary TREF analysis of the sample to be fractionated.

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