Fractionated crystallisation fails at amorphous polymers. Selective precipitation is inappropriate in cases of polymers with different structures and similar solubilities, and in cases of balanced chemical structures and different chain architectures, respectively. Gelchromatography only provides for a restricted throughput.
The invention at hand pertains to separation procedure for polymer systems using permeation through polymer films ? semi-crystalline, cross-linked, amorphous ? with thicknesses in the scale of nanometers. Polymer films with thicknesses in the scale of nanometers provide for a high throughput of the polymers to be separated.
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