A2BA2-Type Amphiphilic Liquid Crystalline Block Copolymers by ATRP: Synthesis and Characterization

Xin De Tang; Nian Feng Han; Jing Xu

doi:10.4028/www.scientific.net/KEM.428-429.154

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 428-429A2BA2-Type Amphiphilic Liquid Crystalline Block...

A₂BA₂-Type Amphiphilic Liquid Crystalline Block Copolymers by ATRP: Synthesis and Characterization

Abstract:

A2BA2-type amphiphilic liquid crystalline block copolymers containing azobenzene were synthesized by atom transfer radical polymerization (ATRP). The macroinitiator prepared by the esterification reaction between poly(ethylene glycol) (PEG) and 2,2-dichloroacetyl chloride was used to initiate the ATRP of 6-[4-(4-ethoxyphenylazo)phenoxy]hexyl methacrylate (M6C). The resulting macroinitiator and block copolymers were characterized by 1H NMR, gel permeation chromatography (GPC). Polarizing optical microscopy (POM) and differential scanning calorimetry (DSC) preliminarily revealed the liquid crystalline property of these block copolymers. These novel amphiphilic liquid crystalline block copolymers are promising in some areas, such as optical data storage, optical switch, and molecular devices.

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Key Engineering Materials (Volumes 428-429)

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154-157

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.428-429.154

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Online since:

January 2010

Authors:

Xin De Tang, Nian Feng Han, Jing Xu

Keywords:

A₂BA₂-Type, Amphiphilic Block Copolymer, Atom Transfer Radical Polymerization (ATRP), Liquid Crystal

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