Synthesis of water-soluble cationic polymers with star-like structure based on cyclodextrin core via ATRP

Jianshu Li, Huining Xiao, Young Shin Kim, Tao Lowe

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

A range of novel cationic star-like polymers (Star-P(MeDMA)s) were synthesized through atom transfer radical polymerization (ATRP) by core-first method, using a β-cyclodextrin initiator with 21 initiation sites (21Br-β-CD). Methyl chloride-quaternized 2-(dimethylamino)ethyl methacrylate (MeDMA) was polymerized in an aqueous medium using 21Br-β-CD, Cu(I)Br, and 2,2′-dipyridyl as an initiator, catalyst, and ligand, respectively. The effects of polymerization temperature and monomer/initiator ratios on the degree and kinetics of polymerization were investigated. The molecular weights, hydrodynamic sizes, and charge densities of the quaternized polymers were characterized using gel permeation chromatography (GPC), dynamic light scattering (DLS), and colloidal titration, respectively. The results demonstrated that the moderate aqueous solubility of the 21Br-β-CD initiator had significant impact on the physicochemical properties of the obtained star polymers. The polymerization of 500/1/2/5 ([M] 0/[I] 0/ [Cu(I) 0/[L] 0]) at 90°C for 6 h was found to be the best condition to synthesize the proposed cationic star polymer with well-defined structures in aqueous medium. The nonlinear relationship between the apparent charge density and the particle size of the cationic star polymers was further revealed by GPC and DLS measurements.

Original languageEnglish (US)
Pages (from-to)6345-6354
Number of pages10
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume43
Issue number24
DOIs
StatePublished - Dec 15 2005
Externally publishedYes

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Atom transfer radical polymerization
Cyclodextrins
Stars
Polymers
Water
Polymerization
Gel permeation chromatography
Dynamic light scattering
Charge density
Methyl Chloride
Titration
Hydrodynamics
Solubility
Monomers
Molecular weight
Particle size
Ligands
Catalysts
Kinetics
Temperature

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

Synthesis of water-soluble cationic polymers with star-like structure based on cyclodextrin core via ATRP. / Li, Jianshu; Xiao, Huining; Kim, Young Shin; Lowe, Tao.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 43, No. 24, 15.12.2005, p. 6345-6354.

Research output: Contribution to journalArticle

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