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Synthesis of Novel Rod‐Coil Amphiphilic Block Copolymers PAA‐ b ‐DPS with Fréchet‐Type Dendronized Polystyrene and Poly(acrylic acid)
Author(s) -
Yi Zhuo,
Zhang Yanhong,
Chen Yongming,
Xi Fu
Publication year - 2008
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200700893
Subject(s) - copolymer , macromonomer , amphiphile , polymer chemistry , acrylic acid , materials science , polystyrene , micelle , acrylate , solvent , styrene , chemistry , polymer , organic chemistry , composite material , aqueous solution
Abstract A series of well‐defined rod‐coil PAA‐ b ‐DPS block copolymers, containing Fréchet‐type dendronized polystyrene (DPS) with different generation as a rod‐like hydrophobic block and poly(acrylic acid) (PAA) as a hydrophilic coil were synthesized. The procedure included the following steps: the precursor PMA‐ b ‐DPS copolymer was prepared through ATRP of Fréchet‐type dendritic styrene macromonomer bearing the first to the third generation (G1–G3), respectively, initiated by poly(methyl acrylate) (PMA‐Br). Then, by converting PMA into PAA by subsequent hydrolysis, the targeted amphiphilic copolymers were obtained. Moreover, by using the rod‐coil amphiphiles as building blocks, large compound micelles and vesicles were formed in a binary solvent mixture of DMF/H 2 O. Morphological changes in self‐assembly showed dependence on the length of the dendronized block.