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URN to cite this document: urn:nbn:de:bvb:703-epub-4811-6
Title data
Mihut, Adriana M. ; Crassous, Jérôme J. ; Schmalz, Holger ; Drechsler, Markus ; Ballauff, Matthias:
Self-assembly of crystalline-coil diblock copolymers in solution: experimental phase map.
In: Soft Matter.
Vol. 8
(2012)
Issue 11
.
- pp. 3163-3173.
ISSN 1744-683X
DOI der Verlagsversion: https://doi.org/10.1039/c2sm06359j
![[thumbnail of c2sm06359j.pdf]](https://epub.uni-bayreuth.de/style/images/fileicons/application_pdf.png)
Project information
| Project title: |
Project's official title Project's id Von partikulären Nanosystemen zur Mesotechnologie SFB 840 |
|---|---|
| Project financing: |
Deutsche Forschungsgemeinschaft European Community, MRTN-CT-2004-504052 [POLYFILM] Adolphe Merkle Foundation |
Abstract
We present the morphological phase map of semicrystalline poly(butadiene)-b-poly(ethylene oxide) (PB-b-PEO) diblock copolymers (BCP) in dilute n-heptane solutions. The solutions of the diblock copolymer have been quenched from 70 degrees C, that is above the melting temperature T-m of the PEO block, following two thermal pathways: (A) by direct immersion into liquid nitrogen and (B) by quenching to the crystallization temperature T-c of the PEO block. Scanning force microscopy (SFM) and transmission electron microscopy (TEM) allowed imaging of the dried crystalline morphologies, whereas in solution the micelles have been visualized by cryogenic transmission electron microscopy (cryo-TEM). The apparent hydrodynamic radii of the micellar structures in solution were determined by dynamic light scattering (DLS). The effects of the block length and block ratio, and the influence of the thermal history on the morphology have been systematically investigated for the series of PB-b-PEO BCP. In pathway A, different morphologies such as spheres, rods, worms and entangled cylinders have been observed; whereas in pathway B, as the weight fraction and the length of the PEO block increased, the morphology changed from spherical to cylindrical or to lamellar, and finally to large dendritic micelles. This tailoring of morphologies is fully reversible with temperature and was found to correlate to the crystalline state of the PEO chains.
Further data
| Item Type: | Article in a journal |
|---|---|
| Additional notes (visible to public): | ISI:000300571600017 |
| Keywords: | AMPHIPHILIC BLOCK-COPOLYMERS; DILUTE-SOLUTION; CYLINDRICAL MICELLES; TRIBLOCK COPOLYMERS; SINGLE-CRYSTALS; MULTICOMPARTMENT MICELLES; SELECTIVE SOLVENT; SHAPED MORPHOLOGY; DRIVEN; OXIDE |
| DDC Subjects: | 500 Science > 540 Chemistry |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner Profile Fields > Advanced Fields > Polymer and Colloid Science Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II Profile Fields Profile Fields > Advanced Fields |
| Language: | English |
| Originates at UBT: | Yes |
| URN: | urn:nbn:de:bvb:703-epub-4811-6 |
| Date Deposited: | 01 Sep 2020 11:03 |
| Last Modified: | 09 Aug 2023 12:46 |
| URI: | https://epub.uni-bayreuth.de/id/eprint/4811 |
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