Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 27, Issue 6, Pages 447-451Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200500769
Keywords
block copolymers; micelles; pH-sensitive polymer; pKb value; polymeric rnicelle; poly(beta-amino esters)
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A pH-sensitive block copolymer is synthesized by step polymerization and its pH-sensitive micellization-demicellization behavior is studied. This polymer has a hydrophilic MPEG (shell) and hydrophobic but pH-sensitive poly(beta-amino ester) (core), which can form a self-assembled micelle. As confirmed by fluorescence spectroscopy and dynamic light scattering (DLS), this polymer shows a sharp pH-sensitive micellization-demicellization behavior. It is confirmed that the pH sensitivity is affected by the molecular weight ratio between the MPEG and poly(beta-amino ester).
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