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Reverse atom transfer radical polymerization (ATRP) of styrene initiated with tetraethylthiuram disulfide (TD)/cuprous bromide (CuBr)/2,2'-bipyridine (bpy) has been successfully carried out at 120 o C. The kinetic plot was first order in monomer. The measured number-average molecular weight was in good accordance with the theoretical one. Radical scavenger 1,1-diphenyl-2-picrylhydrazyl (DPPH)...
The radical polymerization of styrene initiated with tetraethylthiuram disulfide (TD)/nickel (II) chloride (NiCl 2 )/triphenylphosphine (PPh 3 ) was of living nature via a one-electron redox reaction between nickel(II) and (III) species. The mechanism belonged to reverse atom transfer radical polymerization (reverse ATRP). The living essence was affected by the molar concentration...
d,l-3-methylglycolide (MG) was successfully polymerized with multifunctional initiator (trimethylolpropane (TMP) or pentaerythritol (PTOL)) and stannous octoate (SnOct2) catalyst in bulk at 110°C. The effects of molar ratios of monomer to initiator, monomer to catalyst and monomer conversion on the molecular weight of polymer were studied. For the homopolymerization of MG with TMP initiator and SnOct...
A facile method for synthesis of well-defined ABA triblock copolymers, such as poly(vinyl acetate-b-styrene-b-vinyl acetate), was investigated. The polymerization proceeds ‘living’ radical mechanism realized by macro-iniferter technique. The macro-iniferters were designed and synthesized by ‘living’ radical polymerization of vinyl monomers utilizing diethyl 2,3-dicyano-2,3-di(p-N,N-diethyldithiocarbamymethyl)phenylsuccinate...
Living/controlled radical polymerization of methyl methacrylate (MMA) was investigated using a new initiating system, i.e. DCDPS/FeCl3/PPh3, in which diethyl 2,3-dicyano-2,3-diphenylsuccinate (DCDPS) is a hexa-substituted ethane thermal iniferter. The polymerization mechanism belongs to a reverse ATRP process. The polymerization was closely controlled in bulk and in solution at quite low temperature...
Hybrid inorganic-organic materials based on trialkoxysilyl-functionalized, hydroxyl-functionalized and unfunctionalized methyl acrylic polymers have been prepared by the in situ sol-gel process in the presence of tetraethoxysilane. Especially, the trialkoxysilyl-functionalized PMMA/SiO 2 hybrid has been successfully prepared without the use of the trialkoxysilyl-functionalized polymer as...
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