Synthesis of the Four-Arm Star-Block Copolymer [PVC-b-PBA-CH(CH3)-CO-O-CH2](4)C by SET-DTLRP Initiated from a Tetrafunctional Initiator

摘要

Pentaerythritol tetrakis(2-iodopropionate) was used as a tetrafunctional initiator for the Na2S2O4 catalyzed SET-DTLRP of n-butyl acrylate in water at room temperature. The resulting tetrafunctional poly(n-butyl acrylate) macroinitiator with M-n = 14,864 or M-n = 3627 per arm was used to initiate the SET-DTLRP of vinyl chloride and provide the first examples of four-arm star-block copolymers [PVC-b-PBA-CH(CH3)-CO-O-CH2](4)C. The Mn of the PVC segment from each arm of the four-arm star-block copolymer varied between 353 and 33,622. (C) 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 628-634, 2009