Thermoresponsive micelles were successfully prepared from poly(N-isopropylacrylamide)-b-poly(vinylacetate) PVAc-b-PNIPAM diblock copolymers in three different compositions. Both Dynamic Light Scattering Particle Size Analyzer (PSA) and Environmental Scanning Electron Microscopy (ESEM) measurements confirmed the formation of well-defined micelles especially with 1:1 PVAc:PNIPAM composition whereas for other compositions agglomerate formations in the form of vesicles, rods and associated spheres were detected. At the temperature above the lower critical solution temperature (LCST) of PNIPAM, well-defined micelles deformed to form dehydrated and collapsed PNIPAM chain based structures with smaller sizes.

Preparation and characterization of temperature-responsive amphiphilic poly(vinylacetate)-b-poly(n-isopropylacrylamide) diblock copolymer micelles

240th National Meeting (2010)

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