Characterization of Unsaturated Polymers Using High‐Temperature Size Exclusion Chromatography Coupled with Ultraviolet‐Evaporative Light Scattering Dual Detection

Size exclusion chromatography (SEC) is a technique routinely used at high temperature to analyze the molar mass distribution (MMD) in polymers. The of comonomer along axis copolymer key microstructural feature that determines macroscopic properties material and thus its range possible applications. However, unsaturated polymers requiring dissolution temperature, measurement chemical composition (CCD) axis, have so far been hampered by lack suitable detection methods. Toward this goal, potential ultraviolet (UV) for SEC ethylene-styrene, propylene-styrene copolymers, ethylene-propylene-diene terpolymers investigated. influence experimental parameters such as analyte concentration, unsaturation content, mobile phase on spectroscopic response probed. An evaporative light scattering detector (ELSD) employed monitor combination with UV detector, quantitatively measure content MMD. A slice-by-slice UV/ELSD ratio calculated determine average each fraction after separation.