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Key aspects to yield low dispersity of PEO-b-PCL diblock copolymers and their mesoscale self-assembly

Konishcheva, Evgeniia and Häussinger, Daniel and Lörcher, Samuel and Meier, Wolfgang. (2016) Key aspects to yield low dispersity of PEO-b-PCL diblock copolymers and their mesoscale self-assembly. European Polymer Journal, 83. pp. 300-310.

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Official URL: http://edoc.unibas.ch/44257/

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Abstract

Poly(ethylene oxide)-block-polycaprolactone (PEO-b-PCL) is one of the widely used biocompatible amphiphilic block copolymers which is able to self-assemble into a variety of 3D structures, including polymersomes. Controlled self-assembly into a 3D structure with a certain size and morphology might require uniform PEO-b-PCL (ĐM < 1.1), which has not been possible to synthesize so far. In this work, we optimized the well-known synthesis of PEO-b-PCL, catalyzed by SnOct2, leading to a low molecular-weight dispersity (< 1.1), and discussed the aging effects of SnOct2 on the overall kinetics of the synthesis. To understand the effect of the dispersity of PEO-b-PCL on its self-assembly, we compared self-assembled structures formed by uniform PEO-b-PCL (ĐM < 1.1) with the ones formed by non-uniform analogues (ĐM > 1.1). Furthermore, we demonstrated the benefits of uniform PEO-b-PCL when a high degree of end-group activation is required through ω-tosylation.
Faculties and Departments:05 Faculty of Science > Departement Chemie
05 Faculty of Science > Departement Chemie > Chemie > Makromolekulare Chemie (Meier)
UniBasel Contributors:Meier, Wolfgang P. and Häussinger, Daniel
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Elsevier
ISSN:0014-3057
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:03 Oct 2016 12:30
Deposited On:03 Oct 2016 12:30

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