Synthesis and characterization of pH sensitive poly(glycidol)‐b‐poly(4‐vinylpyridine) block copolymers |
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| Authors: | Sebastian Mendrek Aleksandra Mendrek Hans‐Juergen Adler Andrzej Dworak Dirk Kuckling |
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| Affiliation: | 1. Fachrichtung Chemie und Lebensmittelchemie, Technische Universit?t Dresden, D‐01062 Dresden, Germany;2. Center of Polymer and Carbon Materials, M. Sklodowskiej‐Curie 34, 41‐819 Zabrze, Poland;3. Department Chemie, Universit?t Paderborn, Warburgerstrasse 100, D‐33098 Paderborn, Germany |
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| Abstract: | Block copolymers of poly(glycidol)‐b‐poly(4‐vinylpyridine) were obtained by ATRP of 4‐vinylpyridine initiated by ω‐(2‐chloropropionyl) poly(glycidol) macroinitiators. By changing the monomer/macroinitiator ratio in the synthesis polymers with varied P4VP/PGl molar ratio were obtained. The obtained block copolymers showed pH sensitive solubility. It was found that the linkage of a hydrophilic poly(glycidol) block to a P4VP influenced the pKa value of P4VP. DLS measurements showed the formation of fully collapsed aggregates exceeding pH 4.7. Above this pH values the collapsed P4VP core of the aggregates was stabilized by a surrounding hydrophilic poly(glycidol) corona. The size of the aggregates depended significantly upon the composition of the block copolymers. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 1782–1794, 2009 |
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| Keywords: | atom transfer radical polymerization (ATRP) block copolymers core‐shell micelles pH‐sensitive polymers |
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