Self-Assembled Blends of AB/BAB Block Copolymers Prepared through Dispersion RAFT Polymerization
Self-Assembled Blends of AB/BAB Block Copolymers Prepared through Dispersion RAFT Polymerization
复制标题
通过分散 RAFT 聚合制备 AB/BAB 嵌段共聚物的自组装共混物
DOI：
10.1021/acs.macromol.6b00771
复制
发表时间：
2016-06-28
期刊：
影响因子：
5.5
通讯作者：
Zhang, Wangqing
中科院分区：
文献类型：
--
作者：
Gao, Chengqiang;Wu, Jiaping;Zhang, Wangqing
巧妙的纳米组件的合成是材料科学的研究方向。本文报道了用双宏观raft试剂催化分散聚合，原位合成聚乙二醇-嵌段聚苯乙烯/聚苯乙烯-嵌段聚乙二醇-嵌段聚苯乙烯（PEG-b-PS/PS-b-PEG-b-PS） AB/BAB嵌段共聚物自组装共混物。该合成策略结合了聚合物共混和聚合诱导自组装的优点。根据这一策略，制备了各种PEG-b-PS/PS-b-PEG-b-PS共混物的纳米组件，如高属区隔化囊泡、多层和双连续纳米组件以及多孔纳米球。揭示了PEG-b-PS/PS-b-PEG-b-PS的摩尔比、PS嵌段的聚合度和加入的单体浓度等参数对PEG-b-PS/PS-b-PEG-b-PS自组装共混物形貌/结构的影响。对AB/BAB共混物的自组装进行了计算机模拟，结果表明纳米组装与实验中观察到的相似。
Synthesis of ingenious nanoassemblies is pursued in materials science. Herein, the in situ synthesis of the self-assembled blends of AB/BAB block copolymers of poly(ethylene glycol)-block-polystyrene/polystyrene-block-poly(ethylene glycol)-block-polystyrene (PEG-b-PS/PS-b-PEG-b-PS) via two-macro-RAFT agent comediated dispersion polymerization is reported. The synthesis strategy combines the advantages of polymer blending and polymerization-induced self-assembly. Following this strategy, various nanoassemblies of PEG-b-PS/PS-b-PEG-b-PS blends such as high-genus compartmentalized vesicles, multilayer and bicontinuous nanoassemblies, and porous nanospheres are prepared. The parameters, such as PEG-b-PS/PS-b-PEG-b-PS molar ratio, polymerization degree of the PS block, and fed monomer concentration, affecting morphology/structure of PEG-b-PS/PS-b-PEG-b-PS self-assembled blends are revealed. Computer simulations of self-assembly of the AB/BAB blends are performed, and nanoassemblies similar to those observed in...