Adsorption of poly(4-vinyl pyridine) unimers into polystyrene-block-poly(acrylic acid) micelles in ethanol due to hydrogen bonding

作者：Zhang, WQ; Shi, LQ^*; An, YL; Wu, K; Gao, LC; Liu, Z; Ma, RJ; Meng, QB; Zhao, CJ; He, BL

来源：Macromolecules, 2004, 37(8): 2924-2929.

DOI：10.1021/ma0499775

• MONTE-CARLO SIMULATIONS
• BLOCK-COPOLYMERS
• MULTIPLE MORPHOLOGIES
• DILUTE-SOLUTION
• INTERPOLYMER COMPLEXES
• DIBLOCK COPOLYMER
• POLYMER MICELLES
• CHARGED MICELLES
• WATER
• BLENDS

The adsorption of poly(4-vinyl pyridine) (P4VP) unimers into spherical core-shell micelles self-assembled by polystyrene-block-poly(acrylic acid) (PS200-b-PAA(78)) in ethanol is studied by a combination of static light scattering (SLS) and dynamic light scattering (DLS). P4VP unimers with a coil size of ca. 7.9 nm can be first absorbed into the PS-b-PAA spherical core-shell micelles with a hydrodynamic diameter of 79.9 nm and then penetrate into the shell of the micelles to form hydrogen-bonded micelle-unimers complexes in ethanol. During the adsorption, the hydrodynamic diameter and gyration radius of the micelle-unimers complexes decrease first and then stay almost unchanged when P4VP solution in ethanol is added into the PS-b-PAA micelle solution. It is also found that the structure of the micelle-unimers complexes remains spherical but becomes smaller and denser than that of the PS-b-PAA micelles after absorption of P4VP unimers.

• 出版日期2004-4-20
• 单位南开大学