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通过链增长缩聚、苯乙烯类辅助原子转移自由基偶联和开环聚合合成具有聚（N-辛基苯甲酰胺）和聚（ε-己内酯）微臂的新型μ-星形共聚物。

Synthesis of Novel μ-Star Copolymers with Poly(N-Octyl Benzamide) and Poly(ε-Caprolactone) Miktoarms through Chain-Growth Condensation Polymerization, Styrenics-Assisted Atom Transfer Radical Coupling, and Ring-Opening Polymerization.

作者信息

Huang Chih-Feng, Aimi Junko, Lai Kuan-Yu

机构信息

Department of Chemical Engineering, National Chung Hsing University, 250 Kuo Kuang Road, Taichung, 40227, Taiwan.

Molecular Design & Function Group, Research Center for Functional Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan.

出版信息

Macromol Rapid Commun. 2017 Feb;38(3). doi: 10.1002/marc.201600607. Epub 2016 Dec 14.

DOI:10.1002/marc.201600607
PMID:27973699
Abstract

Star copolymers are known to phase separate on the nanoscale, providing useful self-assembled morphologies. In this study, the authors investigate synthesis and assembly behavior of miktoarm star (μ-star) copolymers. The authors employ a new strategy for the synthesis of unprecedented μ-star copolymers presenting poly(N-octyl benzamide) (PBA) and poly(ε-caprolactone) (PCL) arms: a combination of chain-growth condensation polymerization, styrenics-assisted atom transfer radical coupling, and ring-opening polymerization. Gel permeation chromatography, mass-analyzed laser desorption/ionization mass spectrometry, and H NMR spectroscopy reveal the successful synthesis of a well-defined (PBA ) -(PCL ) μ-star copolymer (M ≈ 12 620; Đ = 1.22). Preliminary examination of the PBA PCL μ-star copolymer reveals assembled nanofibers having a uniform diameter of ≈20 nm.

摘要

已知星形共聚物会在纳米尺度上发生相分离，从而提供有用的自组装形态。在本研究中，作者研究了多臂星形（μ-星形）共聚物的合成与组装行为。作者采用了一种新策略来合成具有聚（N-辛基苯甲酰胺）（PBA）和聚（ε-己内酯）（PCL）臂的前所未有的μ-星形共聚物：链增长缩聚、苯乙烯类辅助原子转移自由基偶联和开环聚合的组合。凝胶渗透色谱法、质量分析激光解吸/电离质谱法和1H NMR光谱表明成功合成了定义明确的（PBA）-(PCL)μ-星形共聚物（M≈12620；Đ=1.22）。对PBA-PCLμ-星形共聚物的初步检查显示出直径约为20nm的均匀组装纳米纤维。

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