Premium
Synthesis of Aminoazobenzene‐Containing Diblock Copolymer and Photoinduced Deformation Behavior of its Micelle‐Like Aggregates
Author(s) -
Wang Dongrui,
Ye Gang,
Wang Xiaogong
Publication year - 2007
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.200700424
Subject(s) - copolymer , micelle , materials science , polymer chemistry , polymer , chemistry , aqueous solution , composite material , organic chemistry
A precursor polymer PEO‐ b ‐PEMA that contains anilino moieties is synthesized from EPAEMA by ATRP by using a PEOBr macroinitiator and CuBr/HMTETA catalyst system. The aminoazobenzene‐containing block copolymer PEO‐ b ‐PCN is obtained by the azo‐coupling reaction between PEO‐ b ‐PEMA and the diazonium salt of 4‐aminobenzonitrile. Results show that PEO‐ b ‐PCN has a narrow molecular weight distribution and the repeat unit numbers of the hydrophilic and hydrophobic blocks are 122 and 200, respectively. PEO‐ b ‐PCN can form uniform spherical aggregates by gradually adding water into its THF solution. Upon irradiation with a linearly polarized Ar + laser beam, the spherical aggregates can be significantly elongated in the polarization direction of the light.