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Synthesis and Self-Assembly of Brush-Rod Diblock Copolymers in the Mixed Solvent of THF/H2O

✍ Scribed by Hongqing Cao; Weiran Lin; Anhua Liu; Jie Zhang; Xinhua Wan; Qifeng Zhou

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
211 KB
Volume
28
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Two amphiphilic brush‐rod block copolymers, PEGMA~37~‐b‐MBPS~87~ and PEGMA~37~‐b‐MBPS~141~, were synthesized via ATRP of poly(ethylene glycol)monomethyl ether methacrylate (PEGMA) and (+)‐2,5‐bis[4′‐((S)‐2‐methylbutoxy)phenyl]styrene (MBPS). The self‐assembly of the copolymers in THF/H~2~O was induced by different methods. Spheres were dominant morphologies of PEGMA~37~‐b‐MBPS~87~ regardless of the initial concentration and the rate of water addition. Increase of the length of hydrophobic block, as in PEGMA~37~‐b‐MBPS~141~, led to the coexistence of primary spheres, large compound spherical and rod‐like micelles at a slow water addition rate. Injecting water into the THF solution of PEGMA~37~‐b‐MBPS~141~ quickly or pouring the THF solution into large amount of water resulted only in the formation of spheres.

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