Toward the design of LPEI containing block copolymers: Improved synthesis protocol,selective hydrolysis,and detailed characterization |
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| Authors: | Lutz Tauhardt Kristian Kempe Ulrich S Schubert |
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| Institution: | 1. Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich‐Schiller‐University Jena, Humboldtstr. 10, 07743 Jena, Germany;2. Jena Center for Soft Matter (JCSM), Friedrich‐Schiller‐University Jena, Philosophenweg 7, 07743 Jena, Germany;3. Dutch Polymer Institute (DPI), John F. Kennedylaan 2, 5612 AB Eindhoven, The Netherlands |
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| Abstract: | The synthesis of poly(2‐ethyl‐2‐oxazoline)‐b‐linear poly(ethylenimine) (PEtOx‐b‐LPEI) copolymers by selective basic hydrolysis of PEtOx‐b‐poly(2‐H‐2‐oxazoline) (PEtOx‐b‐PHOx) is described. For this purpose, an easy method for the preparation of the 2‐H‐2‐oxazoline (HOx) monomer was developed. Based on the microwave‐assisted polymerization kinetics for this monomer, PEtOx‐b‐PHOx copolymers were prepared. Subsequently, the block copolymers were selectively hydrolyzed to PEtOx‐b‐LPEI under basic conditions. The success of the polymerizations and subsequent post‐polymerization reactions was demonstrated by 1H NMR spectroscopy and MALDI‐TOF‐MS investigations of the obtained polymers. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012 |
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| Keywords: | block copolymer cationic polymerization linear poly(ethylenimine) poly(2‐H‐2‐oxazoline) ring‐opening polymerization |
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