| Autor: |
Muslim, Arzugul, Zhao, Zixin, Shi, Yi, Malik, Dilnur |
| Zdroj: |
Chemical Papers; Sep2017, Vol. 71 Issue 9, p1721-1729, 9p |
| Abstrakt: |
A series of PEO- b-P tBA- b-PS ( x = 42, 84, 165) triblock terpolymers were synthesized by the atom transfer radical polymerization and characterized by size exclusion chromatography and H NMR. Their self-assemblies were conducted by a two-step hierarchical self-assembly method and a one-step dialysis method and the self-assembly behaviors were investigated. The morphologies, sizes, and size distributions of micelles produced by the self-assembly were determined by transmission electron microscopy and dynamic light scattering. The secondary self-assembled structure of PEO- b-P tBA- b-PS obtained by the two-step hierarchical self-assembly could be controlled by tuning the length of PS block, the core forming block. The micelles were uniform with diameters of 20-25 nm and their size distributions, except for that of PEO- b-P tBA- b-PS, were narrow with particle size distribution indexes ranging from 0.014 to 0.246. The one-step dialysis of the triblock terpolymers produced vesicular micelles with distinct vesicle walls that exhibited similar thicknesses. The vesicles did not show significant aggregation. The size distribution of PEO- b-P tBA- b-PS vesicle was the narrowest with a particle size distribution index value of 0.135. The PEO- b-P tBA- b-PS vesicles tended to overlap with each other. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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