Chromatography of polyolefin copolymers

摘要

The present invention relates to an apparatus for determining the monomer to comonomer ratio of a copolymer wherein the apparatus comprises a high temperature liquid chromatography unit equipped with a graphitic carbon liquid chromatography column, a pump, a polymer solution, and a means for an additional fractionation by size exclusion chromatography or asymmetric flow field flow fractionation, added after the fractionation by the graphitic column.