Self-organization of stack-up block copolymers into polymeric supramolecules
Industrial Research Ltd., Crown Research Institutes, 69 Gracefield Road, 31-310, Lower Hutt, New Zealand
Nanoscale Research Letters 2007, 2:104-106 doi:10.1007/s11671-007-9038-8Published: 24 January 2007
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.