| abstract |
The invention relates to macroporous polymeric membranes, their preparation and their use for polymer separation. n The membranes consist of a cross-linked copolymer on the basis of one or more monovinylic monomers and one or more cross-linking agents and has a globular microstructure whereby the globular structures have a size of 0,05 to 0,5 µm and are mutually interconnected by covalent bonds, and between the globular structures are mutally communicating pores. The thickness is 0,2 to 15 mm, and the specific surface area is up to 400 m²/g. n They are prepared by polymerizing a corresponding monomer mixture including the polymerization initiator in solution in a porogenic solvent in a temperature-controlled mould of appropriate inner dimensions. n The macroporous membranes are particularly suited for the separation of synthetic polymers and biopolymers with gradient elution. |