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Open Access Nano Express

Self-organization of stack-up block copolymers into polymeric supramolecules

Yong J Yuan*, Ka-Wai Choi and Herbert Wong

Author Affiliations

Industrial Research Ltd., Crown Research Institutes, 69 Gracefield Road, 31-310, Lower Hutt, New Zealand

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Nanoscale Research Letters 2007, 2:104-106  doi:10.1007/s11671-007-9038-8

Published: 24 January 2007

Abstract

Polyethylene oxide –b– polypropylene oxide -b- polyethylene oxide (EO106PO70EO106) block copolymer self-organizes into polymeric supramolecules, characterized by NMR as phase transition from the isotropic stack-up block structure to the ordered cubic polymeric supramolecular structure. Its dependence on both temperature and copolymer concentration is clearly shown by the changes in line shape and chemical shift of the PO70blockβ,γresonances.

Keywords:
Self-assembly; Block co-polymer; NMR