Measurements on a series of random copolymers with units of methyl methacrylate (MMA), butyl acrylate (BA), styrene (St), and maleic anhydride (MAH) are performed. A characterization method is used which consists in fractionating the copolymer by size-exclusion chromatography (SEC), collecting 30-40 fractions and then recording both the nuclear magnetic resonance (NMR) spectroscopy and matrix-assisted laser desorption ionization (MALDI) spectra of the fractions. In a successive step, Bivariate Distribution of chain sizes and composition maps are derived from knowledge of the molar mass, weight, and composition of the copolymer fractions.
Size-exclusion chromatography/matrix-assisted laser desorption ionization and SEC/NMR techniques for polymer characterization
2005
Abstract
Measurements on a series of random copolymers with units of methyl methacrylate (MMA), butyl acrylate (BA), styrene (St), and maleic anhydride (MAH) are performed. A characterization method is used which consists in fractionating the copolymer by size-exclusion chromatography (SEC), collecting 30-40 fractions and then recording both the nuclear magnetic resonance (NMR) spectroscopy and matrix-assisted laser desorption ionization (MALDI) spectra of the fractions. In a successive step, Bivariate Distribution of chain sizes and composition maps are derived from knowledge of the molar mass, weight, and composition of the copolymer fractions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
