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

Sung Guk An, Guang Hwa Li, Chang Gi Cho

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)4154-4162
Number of pages9
JournalPolymer
Volume47
Issue number11
DOIs
StatePublished - 2006 May 17

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Polystyrenes
Copolymerization
Polyethylene glycols
Block copolymers
Stars
Chain length
Atoms
Polymers
Styrene
Dendrimers
Polymerization
chloromethylstyrene

Keywords

  • Amphiphilic
  • Dendrimer
  • Hyperbranched

Cite this

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title = "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",
abstract = "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.",
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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. / An, Sung Guk; Li, Guang Hwa; Cho, Chang Gi.

In: Polymer, Vol. 47, No. 11, 17.05.2006, p. 4154-4162.

Research output: Contribution to journalArticle

TY - JOUR

T1 - 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

AU - An, Sung Guk

AU - Li, Guang Hwa

AU - Cho, Chang Gi

PY - 2006/5/17

Y1 - 2006/5/17

N2 - 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.

AB - 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.

KW - Amphiphilic

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