| Literature DB >> 26175001 |
Tobias Rudolph1,2, Adam Nunns3, Steffi Stumpf1,2, Christian Pietsch1,2, Felix H Schacher1,2.
Abstract
The step-wise solution self-assembly of double crystalline organometallic poly(ferrocenyldimethylsilane)-block-poly(2-iso-propyl-2-oxazoline) (PFDMS-b-PiPrOx) diblock copolymers is demonstrated. Two block copolymers are obtained by copper-catalyzed azide-alkyne cycloaddition (CuAAC), featuring PFDMS/PiPrOx weight fractions of 46/54 (PFDMS30-b-PiPrOx75) and 30/70 (PFDMS30-b-PiPrOx155). Nonsolvent induced crystallization of PFDMS in acetone leads in both cases to cylindrical micelles with a PFDMS core. Afterward, the structures are transferred into water for sequential temperature-induced crystallization of the PiPrOx corona, leading to hierarchical double crystalline superstructures, which are investigated using scanning electron microscopy, wide angle X-ray scattering, and differential scanning calorimetry.Entities:
Keywords: anionic ring-opening polymerization; cationic ring-opening polymerization; double crystalline block copolymers; organometallic block copolymers; self-assembly
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Year: 2015 PMID： 26175001 DOI： 10.1002/marc.201500245
Source DB: PubMed Journal: Macromol Rapid Commun ISSN： 1022-1336 Impact factor: 5.734