Self-Assembly of Poly(2-alkyl-2-oxazoline)s by Crystallization in Ethanol–Water Mixtures Below the Upper Critical Solution Temperature
✍ Scribed by Christina Diehl; Ina Dambowsky; Richard Hoogenboom; Helmut Schlaad
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 592 KB
- Volume
- 32
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
Crystallization of poly(2‐isobutyl‐2‐oxazoline) and poly(2‐nonyl‐2‐oxazoline) is found to occur by room temperature annealing below the upper critical solution temperature in ethanol–water solvent mixtures. Both polymers produce similar self‐assembled structures (see image), resembling the previously reported crystalline hierarchical structures obtained from hot aqueous poly(2‐isopropyl‐2‐oxazoline) solutions above the lower critical solution temperature. These observations suggest that the crystallization induced self‐assembly process is a rather general phenomenon occurring for semicrystalline polymers in liquid–liquid two phase systems.magnified image