This article describes for the first time the pseudo-living radical activity of 4-vinyl-1,3-dioxolane-2-one (VEC) monomer towards a free radical homo-polymerization: a kinetic study of VEC homo-polymerization was performed up to 168 hours and it was found that molecular weights, determined via gel permeation chromatography (GPC), and VEC conversion, measured via H-1 NMR spectroscopy, continue to grow over time showing a molecular weights distribution typical of pseudo-living polymerizations. Until today, in co-polymerization with styrene, just a few VEC moieties could be inserted into VEC-styrene co-polymers; in this work VEC controlled radical activity allows, for the first time, the synthesis of di-block co-polymers between styrene and vinyl groups bearing cyclic carbonate functionalities that can be used for further cross-linking reactions. VEC-styrene copolymers were synthesized with different molar ratios between co-monomers and characterized by GPC analyses and H-1 NMR spectra; excellent reaction yields and solubility in apolar solvents were obtained.

The case of 4-vinyl-1,3-dioxolane-2-one: determination of its pseudo-living behavior and preparation of allyl carbonate-styrene co-polymers / O.V. Sabatini, S. Gazzotti, H. Farina, S. Camazzola, M.A. Ortenzi. - In: CHEMISTRYSELECT. - ISSN 2365-6549. - 2:33(2017 Nov), pp. 10748-10753. [10.1002/slct.201702153]

The case of 4-vinyl-1,3-dioxolane-2-one: determination of its pseudo-living behavior and preparation of allyl carbonate-styrene co-polymers

S. Gazzotti;H. Farina
Secondo
;
S. Camazzola
Penultimo
;
M.A. Ortenzi
Ultimo
2017-11

Abstract

This article describes for the first time the pseudo-living radical activity of 4-vinyl-1,3-dioxolane-2-one (VEC) monomer towards a free radical homo-polymerization: a kinetic study of VEC homo-polymerization was performed up to 168 hours and it was found that molecular weights, determined via gel permeation chromatography (GPC), and VEC conversion, measured via H-1 NMR spectroscopy, continue to grow over time showing a molecular weights distribution typical of pseudo-living polymerizations. Until today, in co-polymerization with styrene, just a few VEC moieties could be inserted into VEC-styrene co-polymers; in this work VEC controlled radical activity allows, for the first time, the synthesis of di-block co-polymers between styrene and vinyl groups bearing cyclic carbonate functionalities that can be used for further cross-linking reactions. VEC-styrene copolymers were synthesized with different molar ratios between co-monomers and characterized by GPC analyses and H-1 NMR spectra; excellent reaction yields and solubility in apolar solvents were obtained.
4-vinyl-1; 3-dioxolane-2-one; controlled polymerization; free radical polymerization; styrene
Settore CHIM/05 - Scienza e Tecnologia dei Materiali Polimerici
nov-2017
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/547187
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