Advances in High-Temperature Interaction Chromatography of Polyolefins: A Tutorial on Solvent and Temperature Gradient.

The advancement of high-temperature interaction chromatography (HT-IC) is a key milestone in polyolefin characterization. Temperature gradient interaction chromatography (HT-TGIC) and solvent gradient interaction chromatography (HT-SGIC) are the main separation methods. This Tutorial explains these methods, their historical uses, recent improvements, and suitable detectors for each technique.

Improving temperature gradient interaction chromatography of polyolefins by simultaneous use of different stationary phases.

Temperature gradient interaction chromatography (TGIC) at high temperatures is a powerful method for the chemical composition separation of polyolefins. TGIC is a two-step process where the sample is crystallized on the stationary phase at low temperature followed by the elution of the sample components using a temperature gradient towards high temperatures. For TGIC typically a porous graphitic carbon (PGC) stationary phase is used.