Synthesis and characterization of poly(vinyl chloride-co-vinyl acetate)-graft-poly [(meth)acrylates] by atom transfer radical polymerization

摘要

The graft polymerization of methyl methacrylate and butyl acrylate onto poly(vinyl chloride-co-vinyl acetate) with atom transfer radical polymerization (ATRP) was successfully carried out with copper(I) thiocyanate/N,N,N',N',N"-pentamethyldiethylenetriamine and copper(I) chloride/2,2'-bipyridine as catalysts in the solvent N,N-dimethylformamide. For methyl methacrylate, a kinetic plot of 1n([M](0)/[M])(where [M](0) is the initial monomer concentration and [M] is the monomer concentration) versus time for the graft polymerization was almost linear, and the molecular weight of the graft copolymer increased with increasing conversion, this being typical for ATRP. The formation of the graft polymer was confirmed with gel permeation chromatography, H-1-NMR, and Fourier transform infrared spectroscopy. The glass-transition temperature of the copolymer increased with the concentration of methyl methacrylate. The graft copolymer was hydrolyzed, and its swelling capacity was measured. (C) 2005 Wiley Periodicals, Inc.