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Pospiech, D. ; Werner, S. ; Jehnichen, D. ; Komber, H. ; Friedel, P. ; Reuter, U. ; Funari, S. ; Perlich, .J. ; Voit, B.
Multifunctionalized methacrylate di -and triblock copolymers: synthesis and nanostructure

The introduction of functionalities into block copolymers opens a wide field of possibilities for subsequent reactions, for instance to stabilize the morphology or to create stable hybrids. Methacrylate-based di- and triblock copolymers were synthesized by sequential anionic polymerization. Allyl methacrylate was used to form the third block and as comonomer distributed randomly in one of the blocks of a diblock copolymer. Anionic polymerization with allyl methacrylate raised the polydispersity of poly(pentyl methacrylate-b-allyl methacrylate-b-pentyl methacrylate) slightly. The successful introduction of allyl functions was proven by NMR spectroscopy. Thus, the synthesis of triblock copolymers having a middle block with one reactive group in each repeating unit was achieved. The block copolymers are phase separated which was shown by SAXS, TEM and by a calculated phase diagram. The allyl functions could be converted into OH-functions by hydroboration raising the polarity of the respective block and thus, the state of phase separation.

Source
Journal of Nanostructured Polymers and Nanocomposites 8, 58-66

DOI
http://www.jnpn.org/03,08,02,04.html

Published
May 2012
 
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