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Synthesis and characterization of amphiphilic poly(ethylene oxide)-block-poly(hexyl methacrylate) copolymers

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons48644

Renker,  S.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons47980

Gutmann,  Jochen S.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons49000

Wiesner,  U.
MPI for Polymer Research, Max Planck Society;

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Citation

Mahajan, S., Renker, S., Simon, P. F. W., Gutmann, J. S., Jain, A., Gruner, S. M., et al. (2003). Synthesis and characterization of amphiphilic poly(ethylene oxide)-block-poly(hexyl methacrylate) copolymers. Macromolecular Chemistry and Physics, 204(8), 1047-1055.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-61EB-1
Abstract
We describe the preparation of amphiphilic diblock copolymers made of poly(ethylene oxide) (PEO) and poly(hexyl methacrylate) (PHMA) synthesized by anionic polymerization of ethylene oxide and subsequent atom transfer radical polymerization (ATRP) of hexyl methacrylate (HMA). The first block, PEO, is prepared by anionic polymerization of ethylene oxide in tetrahydrofuran. End capping is achieved by treatment of living PEO chain ends with 2-bromoisobutyryl bromide to yield a macroinitiator for ATRP. The second block is added by polymerization of HMA, using the PEO macroinitiator in the presence of dibromobis(triphenylphosphine) nickel(II), NiBr2(PPh3)(2), as the catalyst. Kinetics studies reveal absence of termination consistent with controlled polymerization of HMA. GPC data show low polydispersities of the corresponding diblock copolymers. The microdomain structure of selected PEO-block-PHMA block copolymers is investigated by small angle X-ray scattering experiments, revealing behavior expected from known diblock copolymer phase diagrams.