Efficient synthesis of sterically-stabilized nano-objects via RAFT dispersion polymerization of benzyl methacrylate in alcoholic media.
Adv Mater
; 24(25): 3378-82, 2012 Jul 03.
Article
em En
| MEDLINE
| ID: mdl-22605479
ABSTRACT
Synthesis of diblock copolymer nano-objects alcohol is a good idea! RAFT dispersion polymerization of benzyl methacrylate in alcohol using weak polyelectrolyte-based chain transfer agents allows the facile synthesis of sterically stabilized diblock copolymer nano-objects with very high monomer conversions. Such syntheses are usually problematic when conducted in water due to electrostatic repulsion between highly charged stabilizer chains, which impedes in situ self-assembly. Construction of a detailed phase diagram facilitates reproducible syntheses of well-defined diblock copolymer spheres, worms or vesicles, since it allows mixed phase regions to be avoided. Aqueous electrophoresis studies confirm that these nano-objects can acquire substantial surface charge when transferred to aqueous solution due to ionization (or protonation) of the polyacid (or polybase) stabilizer chains.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article