Characterizing Composition and Molar Mass of a Copolymer by SEC-MALS-dRI-UV

This application note describes how molecular weight and composition of random-copolymer samples with a UV-absorbing component may be determined quickly and accurately. The technique utilizes size exclusion chromatography (SEC) and analysis by a triple-detector system comprised of MALS, UV and RI detectors combined with ASTRA software. This method provides a full and contiguous analysis of composition distribution of copolymers.