Separating effective high density polyethylene segments from olefin block copolymers using high temperature liquid chromatography with a preloaded discrete adsorption promoting solvent barrier.

•HTLC under LCD was developed and applied to olefin block copolymers.•Single preloaded adsorli barrier was used to separate effective HDPE segments.•FTIR detection was used to aid in interpretation of the results.•Separation is sensitive to block ratio, comonomer content and architecture.