Collect. Czech. Chem. Commun. 2007, 72, 1244-1254

Copolymerization of 2-[3-(2H-Benzotriazol-2-yl)-4-hydroxyphenyl]ethyl Methacrylate with Styrene

Martin Schovaneca,*, Jiří Horálekb, Štěpán Podzimekb and Jaromír Šňupáreka

a Institute of Polymeric Materials, University of Pardubice, 532 10 Pardubice, Czech Republic
b SYNPO, a.s., 532 07 Pardubice, Czech Republic


Radical copolymerization of 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl methacrylate (M1) with styrene (M2) at 70 °C in 1,4-dioxane was investigated and the reactivity ratios were determined. The copolymerization was carried out as batch copolymerization to a low conversion or as copolymerization with a continuous addition of monomers at higher instantaneous conversion. The monomer reactivity ratios of the copolymerizable UV stabilizer 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl methacrylate with styrene were determined using the Finemann-Ross plot for both copolymeration techniques. The estimated reactivity ratios were r1 = 0.588 and r2 = 0.6 for the technique of continuous addition of monomers and r1 = 0.462 and r2 = 0.476 and for the batch experiment. The copolymerization exhibited an azeotrope at f1 = 0.507, thus a copolymer with microstructure close to the alternating one was formed at this ratio of comonomers.

Keywords: Copolymerizable UV stabilizer; Reactivity ratios; Copolymerizations; Liquid chromatography; Finemann-Ross plot; Polymers; Macromolecules; Polystyrene.

References: 17 live references.