通过光引发原子转移自由基聚合（PhotoATRP）和自由基捕获辅助原子转移自由基偶联制备的热降解聚（丙烯酸丁酯）模型网络。
Thermally Degradable Poly(-butyl acrylate) Model Networks Prepared by PhotoATRP and Radical Trap-Assisted Atom Transfer Radical Coupling.
作者信息
Martinez Michael R, Zhuang Ziye, Treichel Megan, Cuthbert Julia, Sun Mingkang, Pietrasik Joanna, Matyjaszewski Krzysztof
机构信息
Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA.
Faculty of Chemistry, Institute of Polymer and Dye Technology, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland.
出版信息
Polymers (Basel). 2022 Feb 12;14(4):713. doi: 10.3390/polym14040713.
Model poly(-butyl acrylate) (PBA) networks were prepared by photoinduced atom transfer radical polymerization (photoATRP), followed by curing of polymer stars via atom transfer radical coupling (ATRC) with a nitrosobenzene radical trap. The resulting nitroxyl radical installed thermally labile alkoxyamine functional groups at the junctions of the network. The alkoxyamine crosslinks of the network were degraded back to star-like products upon exposure to temperatures above 135 °C. Characterization of the degraded products via gel permeation chromatography (GPC) confirmed the inversion of polymer topology after thermal treatment.
通过光诱导原子转移自由基聚合（photoATRP）制备了聚（丙烯酸丁酯）（PBA）网络模型，随后通过原子转移自由基偶联（ATRC）与亚硝基苯自由基捕获剂对聚合物星型分子进行固化。所得的硝酰自由基在网络节点处安装了热不稳定的烷氧基胺官能团。当暴露于135℃以上的温度时，网络的烷氧基胺交联键降解回星型产物。通过凝胶渗透色谱（GPC）对降解产物进行表征，证实了热处理后聚合物拓扑结构的转变。
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