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Synthesis of poly(epichlorohydrin-g-methyl methacrylate) and poly(epichlorohydrin-g-styrene) graft copolymers by a combination of cationic and photopolymenzation methods

Abstract:

Poly(epichlorohydrin-g-styrene) and poly (epichlorohydrin-g-methyl methacrylate) graft copolymers were synthesized by a combination of cationic and photoinitiated free-radical polymerization. For this purpose, first, epichlorohydrin was polymerized with tetrafluoroboric acid (HBF4) via a cationic ring-opening mechanism, and, then, polyepichlorohydrin (PECH) was reacted ethylhydroxymethyl dithio sodium carbamate to obtain a macrophotoinitiator. PECH, possessing photolabile thiuram di-sulfide groups, was used in the photoinduced polymerization of styrene or methyl methacrylate to yield the graft copolymers. The graft copolymers were characterized by 1H-NMR spectroscopy, differential scanning calorimetry, and gel permeation chromatography. © 2007 Wiley Periodicals, Inc.