关键词: 嵌段共聚物, 糖聚合物, 分子聚集体, 自组装

Abstract: Amphiphilic diblock copolymers containing glycopolymer segments, polystyrene block-poly[2-(-D-glucopyranosyloxy)ethylacrylate](PS-b-PGEA), were synthesized by atom transfer radical polymerization. The morphologies of the crew-cut aggregates of PS-b-PGEA in water were studied by TEM. It has been found that for one specific diblock copolymer, the morphological transformation from spheres to vesicles was controllable by changing solvents. Spheres, rods and vesicles were found to be the dominant morphologies for PS₅₅-b-PGEA₉when the solvents were DMF, DMF/1,4-doxane and 1,4-dioxane respectively. When same solvent, e.g . 1,4-dioxane, was used, sphere to vesicle transition of crew-cut aggregates was also obtainable by using diblock copolymers of different compositions. The copolymers with a higher hydrophilic segment content tend to form spheres, while those with a lower content yield predominated vesicles.

Key words: Diblock copolymer, Glycopolymer, Molecular aggregates, Self-assembly