Hierarchical Self-Assembly of Double-Crystalline Poly(ferrocenyldimethylsilane)-block-poly(2-iso-propyl-2-oxazoline) (PFDMS-b-PiPrOx) Block Copolymers

作者：Rudolph Tobias; Nunns Adam; Stumpf Steffi; Pietsch Christian; Schacher Felix H

来源：Macromolecular Rapid Communications, 2015, 36(18): 1651-1657.

DOI：10.1002/marc.201500245

• anionic ring-opening polymerization
• double crystalline block copolymers
• cationic ring-opening polymerization
• organometallic block copolymers
• self-assembly

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-PiPrOx(75)) and 30/70 (PFDMS30-b-PiPrOx(155)). 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.

• 出版日期2015-9