Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Self-organization of stack-up block copolymers into polymeric supramolecules | Nanoscale Res Lett 2007 2 104-106 DOI s11671-007-9038-8 NANO EXPRESS Self-organization of stack-up block copolymers into polymeric supramolecules Yong J. Yuan Ka-Wai Choi Herbert Wong Published online 24 January 2007 to the authors 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 PO70 block b c resonances. Keywords Self-assembly Block co-polymer nMr Self-assembly of polymeric supramolecules is a powerful tool for producing functional materials that combine several properties 1 . Potential applications include information storage magnetic fluid medical diagnosis catalysis ceramics sensors separations and reactions involving large molecules chromatographic media proton conducting materials controlled release of agrochemicals hosts for supramolecular assembly and pigments solubilising agent in paints and cosmetics 2 . . Commercially available non-ionic Pluronics or Syn-peronics triblock copolymers 3 polyethylene oxidepolypropylene oxide-polyethylene oxide EOm POnEOm are superior polymeric templates which produce material of a wide pore diameter and wall thickness 4 5 . The concept of stacking triblock Y. J. Yuan H . Choi H. Wong Industrial Research Ltd. Crown Research Institutes 69 Gracefield Road 31-310 Lower Hutt New Zealand e-mail copolymers 4 was proposed to produce very long-range linear nanostructures due to extension more or less indefinitely in both directions. The synthesized conical molecules which are shaped like a badminton shuttlecock were reported to stack together in a directed manner 6 . The specific shapes open up the huge potential for .
