Synthesis and Characterization of a Novel Bisnitroxide Initiator for Effecting “Outside-In” Polymerization
作者:Nicole L. Hill、Rebecca Braslau
DOI:10.1021/ma051217m
日期:2005.11.1
based initiator for use in nitroxide-mediated free radical polymerization (NMRP) has been synthesized and is demonstrated to effect controlled polymerizations. The bisnitroxide forms “living” systems; the resulting polymers are formed with low polydispersities. The addition of a second block is facile, forming symmetrical ABA triblock copolymers. Monomer addition occurs at the center of the living polymer
合成了一种新的基于双-α-氢氮氧自由基的引发剂,该引发剂用于氮氧自由基介导的自由基聚合(NMRP)中,并已证明可实现受控聚合。二氧化氮形成“生命”系统;形成的聚合物具有低多分散性。第二嵌段的添加容易,形成对称的ABA三嵌段共聚物。单体加成发生在活性聚合物的中心。这种“由内而外”的策略克服了以前在使用NMRP通过更传统的互补“由内而外”双向氮氧化物引发剂制备ABA三嵌段共聚物时遇到的序列特异性限制。