Journal of Polymer Science Part A: Polymer Chemistry, Vol.43, No.4, 773-778, 2005
Single electron transfer-degenerative chain transfer mediated living radical polymerization (SET-DTLRP) of vinyl chloride initiated with methylene iodide and catalyzed by sodium dithionite
Single electron transfer-degenerative chain transfer mediated living radical polymerization (SET-DTLRP) of vinyl chloride (VC) initiated with methylene iodide (CH2I2) and catalyzed by sodium dithionite (Na2S2O4) in water at 35 degreesC produces a telechelic poly(vinyl chloride) (UP-PVC) with two different active chain ends: ICH2(CH2CHCl)(n-1)CH2CHClI, and 2.0 functionality. The reactivity and initiator efficiency of CH2I2 in SET-DTLRP of VC was lower than those of iodoform. A possible mechanism for the CH2I2-initiated SET-DTLRP of VC was suggested. (C) 2005 Wiley Periodicals, Inc.
Keywords:living polymerization;radical polymerization;vinyl chloride;poly(vinyl chloride);sodium dithionite;methylene iodide;single electron transfer;degenerative chain transfer;telechelic