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Synthesis of Poly(vinyl acetate)‐ block ‐poly(dimethylsiloxane)‐ block ‐poly(vinyl acetate) Copolymers by Iodine Transfer Photopolymerization in Miniemulsion
Author(s) -
Tonnar Jeff,
Pouget Emmanuel,
LacroixDesmazes Patrick,
Boutevin Bernard
Publication year - 2009
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200950703
Subject(s) - miniemulsion , copolymer , vinyl acetate , polymer chemistry , photopolymer , polymerization , materials science , catalytic chain transfer , radical polymerization , polymer , composite material
Summary: Iodine transfer polymerization of vinyl acetate in aqueous miniemulsion, initiated by UV radiation in the presence of an α , ω ‐diiodo‐poly(dimethylsiloxane) macrophotoiniferter has been performed. The formation of a triblock copolymer latex PVAc‐ b ‐PDMS‐ b ‐PVAc has been evidenced by 1 H‐NMR and size exclusion chromatography. The size of the PDMS and PVAc blocks were modulated thus opening the way to a wide range of copolymers with different properties. A detailed study of the reaction mechanism showed the importance of the aqueous dispersed medium to achieve a controlled polymerization.