Synthesis and micellar behavior of amphiphilic polystyrene - Poly[bis(methoxyethoxyethoxy)phosphazene] block copolymers

Harry R. Allcock; Eric S. Powell; Youngkyu Chang; Chulhee Kim

doi:10.1021/ma049364s

Synthesis and micellar behavior of amphiphilic polystyrene - Poly[bis(methoxyethoxyethoxy)phosphazene] block copolymers

Harry R. Allcock, Eric S. Powell, Youngkyu Chang, Chulhee Kim

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

Abstract

Amphiphilic diblock copolymers with varying compositions of hydrophilic poly[bis(methoxyethoxyethoxy)phosphazene] and Hydrophobic polystyrene were synthesized via the living, cationic polymerization of Cl ₃P= NSiMe ₃, using a polystyrenyl - phosphoranimine as a macroterminator. The self-association behavior of the block copolymers in aqueous media was investigated using fluorescence spectroscopy, transmission electron microscopy, and dynamic light scattering. The critical micelle concentrations of PS-MEEP block copolymers with molar block ratios of 1:0.37, 1:0.58, 1:0.70, and 1:0.86 were determined to be 1.8, 2.3, 10.0, and 13.6 mg/L, respectively. The mean diameters of micelles of these block copolymers were measured as 167, 168, 179, and 173 nm through dynamic light scattering. The equilibrium constants of pyrene in these micelles ranged from 5.75 × 10 ⁵ to 7.31 × 10 ⁴.

Original language	English (US)
Pages (from-to)	7163-7167
Number of pages	5
Journal	Macromolecules
Volume	37
Issue number	19
DOIs	https://doi.org/10.1021/ma049364s
State	Published - Sep 21 2004

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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@article{3f5ff651a53d4ccda6656a93fe25a05d,

title = "Synthesis and micellar behavior of amphiphilic polystyrene - Poly[bis(methoxyethoxyethoxy)phosphazene] block copolymers",

abstract = "Amphiphilic diblock copolymers with varying compositions of hydrophilic poly[bis(methoxyethoxyethoxy)phosphazene] and Hydrophobic polystyrene were synthesized via the living, cationic polymerization of Cl 3P= NSiMe 3, using a polystyrenyl - phosphoranimine as a macroterminator. The self-association behavior of the block copolymers in aqueous media was investigated using fluorescence spectroscopy, transmission electron microscopy, and dynamic light scattering. The critical micelle concentrations of PS-MEEP block copolymers with molar block ratios of 1:0.37, 1:0.58, 1:0.70, and 1:0.86 were determined to be 1.8, 2.3, 10.0, and 13.6 mg/L, respectively. The mean diameters of micelles of these block copolymers were measured as 167, 168, 179, and 173 nm through dynamic light scattering. The equilibrium constants of pyrene in these micelles ranged from 5.75 × 10 5 to 7.31 × 10 4.",

author = "Allcock, {Harry R.} and Powell, {Eric S.} and Youngkyu Chang and Chulhee Kim",

year = "2004",

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T1 - Synthesis and micellar behavior of amphiphilic polystyrene - Poly[bis(methoxyethoxyethoxy)phosphazene] block copolymers

AU - Allcock, Harry R.

AU - Powell, Eric S.

AU - Chang, Youngkyu

AU - Kim, Chulhee

PY - 2004/9/21

Y1 - 2004/9/21

N2 - Amphiphilic diblock copolymers with varying compositions of hydrophilic poly[bis(methoxyethoxyethoxy)phosphazene] and Hydrophobic polystyrene were synthesized via the living, cationic polymerization of Cl 3P= NSiMe 3, using a polystyrenyl - phosphoranimine as a macroterminator. The self-association behavior of the block copolymers in aqueous media was investigated using fluorescence spectroscopy, transmission electron microscopy, and dynamic light scattering. The critical micelle concentrations of PS-MEEP block copolymers with molar block ratios of 1:0.37, 1:0.58, 1:0.70, and 1:0.86 were determined to be 1.8, 2.3, 10.0, and 13.6 mg/L, respectively. The mean diameters of micelles of these block copolymers were measured as 167, 168, 179, and 173 nm through dynamic light scattering. The equilibrium constants of pyrene in these micelles ranged from 5.75 × 10 5 to 7.31 × 10 4.

AB - Amphiphilic diblock copolymers with varying compositions of hydrophilic poly[bis(methoxyethoxyethoxy)phosphazene] and Hydrophobic polystyrene were synthesized via the living, cationic polymerization of Cl 3P= NSiMe 3, using a polystyrenyl - phosphoranimine as a macroterminator. The self-association behavior of the block copolymers in aqueous media was investigated using fluorescence spectroscopy, transmission electron microscopy, and dynamic light scattering. The critical micelle concentrations of PS-MEEP block copolymers with molar block ratios of 1:0.37, 1:0.58, 1:0.70, and 1:0.86 were determined to be 1.8, 2.3, 10.0, and 13.6 mg/L, respectively. The mean diameters of micelles of these block copolymers were measured as 167, 168, 179, and 173 nm through dynamic light scattering. The equilibrium constants of pyrene in these micelles ranged from 5.75 × 10 5 to 7.31 × 10 4.

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JF - Macromolecules

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ER -

Synthesis and micellar behavior of amphiphilic polystyrene - Poly[bis(methoxyethoxyethoxy)phosphazene] block copolymers

Abstract

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