Synthesis of amphiphilic star block copolymers of polystyrene with PEG core via ATRP - control of chain architecture and the formation of core-shell type globular structure

被引：0

作者：

An, Sung Guk ^{[1
]}

Li, Guang Hwa ^{[1
]}

Cho, Chang Gi ^{[1
]}

机构：

[1] Hanyang Univ, Ctr Adv Funct Polymers, Dept Fiber & Polymer Engn, Seoul 133791, South Korea

来源：

POLYMER | 2006年 / 47卷 / 11期

关键词：

dendrimer; hyperbranched; amphiphilic;

D O I：

10.1016/j.polymer.2006.02.041

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Amphiphilic star block copolymers made of poly(ethylene glycol) (PEG) core and branched PS arms having controlled chain lengths and numbers were synthesized by atom transfer radical copolymerization (ATRP) of styrene and chloromethylstyrene (CMS) in the presence of tetrafunctional PEG macroinitiator. The chain lengths and number of PS chains were controlled by adjusting the initial feed ratio of CMS to styrene and CMS to hydrophilic tetrafunctional macroinitiator, respectively, for a given polymerization time. The obtained polymers have well defined and controlled architectures. Use of excess amount of CMS and longer reaction time leads to the synthesis of dendrimer like amphiphilic block copolymer having four hyperbranched polymer arms, whose shape is closer to globular core-shell structure compared to general star shape polymers. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：4154 / 4162

页数：9

共 28 条

[1] Alexandridis P., 2000, AMPHIPHILIC BLOCK CO
[2] Synthesis and characterization of dumbbell type amphiphilic block copolymers via ATRP
An, SG
Cho, CG
[J]. POLYMER BULLETIN, 2004, 51 (04) : 255 - 262
[3] Amphiphilic stars and dendrimer-like architectures based on poly(ethylene oxide) and polystyrene
Angot, B
Taton, D
Gnanou, Y
[J]. MACROMOLECULES, 2000, 33 (15) : 5418 - 5426
[4] Development of a universal alkoxyamine for "living" free radical polymerizations
Benoit, D
Chaplinski, V
Braslau, R
Hawker, CJ
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (16) : 3904 - 3920
[5] Frechet J. M. J., 2001, DENDRIMERS OTHER DEN
[6] Dendrimers and other dendritic macromolecules:: From building blocks to functional assemblies in nanoscience and nanotechnology
Fréchet, JMJ
[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2003, 41 (23) : 3713 - 3725
[7] Synthesis of branched and hyperbranched polystyrenes
Gaynor, SG
Edelman, S
Matyjaszewski, K
[J]. MACROMOLECULES, 1996, 29 (03) : 1079 - 1081
[8] Stimuli-responsive hybrid macromolecules: Novel amphiphilic star copolymers with dendritic groups at the periphery
Gitsov, I
Frechet, JMJ
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (15) : 3785 - 3786
[9] Initiating systems for nitroxide-mediated ''living'' free radical polymerizations: Synthesis and evaluation
Hawker, CJ
Barclay, GG
Orellana, A
Dao, J
Devonport, W
[J]. MACROMOLECULES, 1996, 29 (16) : 5245 - 5254
[10] Preparation and characterization of hyperbranched polyacrylate copolymers by self-condensing vinyl copolymerization (SCVCP)
Hong, CY
Pan, CY
[J]. POLYMER INTERNATIONAL, 2002, 51 (09) : 785 - 791

← 1 2 3 →