通过不同瓶刷交联制备的米克托刷臂星形聚合物：合成与溶液形态
Mikto-Brush-Arm Star Polymers via Cross-Linking of Dissimilar Bottlebrushes: Synthesis and Solution Morphologies.
作者信息
Shibuya Yoshiki, Nguyen Hung V-T, Johnson Jeremiah A
机构信息
Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
出版信息
ACS Macro Lett. 2017 Sep 19;6(9):963-968. doi: 10.1021/acsmacrolett.7b00529. Epub 2017 Aug 21.
A convergent brush-first ring-opening metathesis polymerization (ROMP) approach for the synthesis of mikto-brush-arm star polymers (MBASPs) via cross-linking of dissimilar bottlebrush polymers is reported. Living bottlebrush polymers prepared via ROMP of norbornene-terminated poly(ethylene glycol) (PEG) or polystyrene (PS) macromonomers (MMs) were mixed together in a desired ratio and exposed to a bis-norbornene cross-linker to yield MBASPs with narrow size distributions. Dynamic light scattering (DLS) and transmission electron microscopy (TEM) revealed that the solution morphologies of MBASPs depended on the feed ratio of the PEG and PS bottlebrush polymers at the cross-linking stage. This work provides a robust and modular strategy for the synthesis of a new type of miktoarm star polymer wherein the star arms are bottlebrush polymers.
报道了一种通过不同的瓶刷状聚合物交联来合成米克托刷臂星形聚合物（MBASP）的收敛性刷先开环易位聚合（ROMP）方法。通过降冰片烯封端的聚乙二醇（PEG）或聚苯乙烯（PS）大分子单体（MM）的ROMP制备的活性瓶刷状聚合物按所需比例混合在一起，并暴露于双降冰片烯交联剂中，以产生具有窄尺寸分布的MBASP。动态光散射（DLS）和透射电子显微镜（TEM）表明，MBASP的溶液形态取决于交联阶段PEG和PS瓶刷状聚合物的进料比。这项工作为合成一种新型的米克托臂星形聚合物提供了一种稳健且模块化的策略，其中星形臂为瓶刷状聚合物。
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