Atom transfer radical polymerization of (meth)acrylates and their novel block copolymers with vinyl acetate |
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Authors: | Mohammad Ali Semsarzadeh Ahmad Mirzaei Ebrahim Vasheghani-Farahani |
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Institution: | a Polymer Group, Chemical Engineering Department, Tarbiat Modarres University, Jalal Al Ahmad Highway, P.O. Box 14155-143, Tehran, I.R., Iran b Department of Polymerization Reaction Engineering, Iran Polymer and Petrochemical Institute, P.O. Box 14965/115, Tehran, I.R., Iran |
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Abstract: | Homopolymerization of methyl acrylate (MA) and methyl methacrylate (MMA) by atom transfer radical polymerization (ATRP) were carried out at 90 °C using methyl-2-bromopropionate (MBP) as initiator, copper halide (CuX, X=Cl, Br) as catalyst, 2,2′-bipyridine (bpy) or N,N,N′,N′,N″-pentamethyldiethylenetriamine (PMDETA) as ligand in 1-butanol (less polar and containing OH) and acetonitrile (more polar) solvents. It was found that with CuCl/bpy catalyst ATRP of MA and MMA in 1-butanol proceeded faster than that in acetonitrile. The rate of ATRP of MA and MMA in acetonitrile and 1-butanol was comparable when CuCl/PMDETA used as catalyst system. The number-average molecular weights increased with conversion and polydispersities were low . The ATRP of MA and MMA with vinyl acetate telomer having trichloromethyl end group (PVAc-CCl3) were also used to synthesize new block copolymers. The structures and molecular weight of synthesized PVAc-b-PMA and PVAc-b-PMMA were characterized by 1H NMR, FTIR spectroscopy and gel permeation chromatography (GPC) and shown that the block copolymers were novel. |
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Keywords: | Acetonitrile Atom transfer radical polymerization (ATRP) 1-Butanol (Meth)acrylate PVAc-b-PMA PVAc-b-PMMA |
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