Well-Defined Amphiphilic Poly(2-oxazoline) ABA-Triblock Copolymers and Their Aggregation Behavior in Aqueous Solution

被引：28
|
作者：
Krumm, Christian [1 ]
Fik, Christoph P. [1 ]
Meuris, Monika [1 ]
Dropalla, Georg J. [1 ]
Geltenpoth, Helma [2 ]
Sickmann, Albert [2 ]
Tiller, Joerg C. [1 ]
机构：
[1] TU Dortmund, Dept Bio & Chem Engn, Chair Biomat & Polymer Sci, D-44227 Dortmund, Germany
[2] Leibniz Inst Analyt Wissensch ISAS eV, D-44227 Dortmund, Germany
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 2012年 / 33卷 / 19期
关键词：
ABA-triblock copolymers; end groups; living polymerization; polymersomes; polyoxazoline; RING-OPENING POLYMERIZATION; VESICLES; 2-ETHYL-2-OXAZOLINE; NANOPARTICLES; INITIATORS; MICELLES;
D O I：
10.1002/marc.201200192
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Self-organization of block copolymers in solution is a way to obtain advanced functional superstructures. The synthesis of well-defined polymethyloxazoline-block-polyphenyloxazoline-block-polymethyloxazoline triblock copolymers is described and proven by 1H NMR spectroscopy, SEC, and ESIMS. The surprisingly water- soluble block copolymers do self-organize in aqueous solutions uniquely forming three coexisting well-defined structures: unimolecular micelles, micellar aggregates, and very form-stable polymersomes. This is the first example of a polymersome forming ABA-triblock copolymer with a glassy middle block. The spherical vesicles are analysed by scanning electron microscopy and transmission electron microscopy. It could be shown that these vesicles are indeed hollow spheres.
引用
收藏
页码：1677 / 1682
页数：6
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