Reentrant morphological transitions in copolymer micelles with pH-sensitive corona

In contrast to self-assembled aggregates of conventional ionic (including polymeric) surfactants the equilibrium micelles of diblock copolymer with a pH-sensitive polyelectrolyte block can exhibit two inverse sequences of morphological transitions triggered by an increase in solution salinity. The d...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1991. - 21(2005), 8 vom: 12. Apr., Seite 3229-31
1. Verfasser: Borisov, O V (VerfasserIn)
Weitere Verfasser: Zhulina, E B
Format: Aufsatz
Sprache:English
Veröffentlicht: 2005
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Letter
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245 1 0 |a Reentrant morphological transitions in copolymer micelles with pH-sensitive corona 
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520 |a In contrast to self-assembled aggregates of conventional ionic (including polymeric) surfactants the equilibrium micelles of diblock copolymer with a pH-sensitive polyelectrolyte block can exhibit two inverse sequences of morphological transitions triggered by an increase in solution salinity. The direct sequence of the sphere-cylinder-lamella transitions is similar to that for the copolymer with a strongly dissociating ionic block and occurs at a high salt concentration in solution. The abnormal reversed sequence of the lamella-cylinder-sphere transitions is predicted to occur at relatively low ionic strength in solution. The origin of the reentrant transitions is coupling between aggregation and ionization in copolymer micelles 
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