THE ANALYSIS OF FLUORESCENT POLY(METHYL M ETHACRYLATE) BY GEL-PERMEATION CHROMATOGRAPHY

The content and distribution of luminophor additives in PMMA was deter mined by the GPC method using refractometric and photometric detectors . PMMA was obtained in the presence of vinyldiphenyloxadiazole, 9-viny lanthracene, and 7-diethylamino-4-methylcoumarin. Due to its double bo nds, vinyldiphenyloxadiazole becomes completely incorporated in PMMA, and does not influence the kinetics of polymerization and MWD. 9-vinyl anthracene is only partly involved in the copolymerization reaction wi th MMA, decreasing both the polymerization rate and the mean molecular weights of the polymer. 7-diethylamino-4-methylcoumarin, which is a p art of the initiating complex along with dicyclohexylperoxydicarbonate , forms the end groups of PMMA macromolecules.