Model nonlinear block copolymers: Synthesis, characterization, morphology

N. Hadjichristidis; Y. Tselikas; H. Iatrou; V. Efstratiadis; A. Avgeropoylos

doi:10.1080/10601329608014919

Model nonlinear block copolymers: Synthesis, characterization, morphology

N. Hadjichristidis^*, Y. Tselikas, H. Iatrou, V. Efstratiadis, A. Avgeropoylos

^*Corresponding author for this work

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

26 Scopus citations

Abstract

The synthesis of well-defined, near monodisperse, nonlinear block copolymers of the A₂B (3-miktoarm star copolymers), A₃B (4-miktoarm star copolymers), (AB)₂(BA)₂ (inversed 4-miktoarm star block copolymers), and A₃BA₃ (bridged miktoarm star copolymers) types is described. A is polyisoprene (PI) and B is polystyrene (PS). The synthetic approach involves the reaction of methyltrichlorosilane or tetrachlorosilane with monofunctional or difunctional macroanions of B under conditions unfavorable to chain coupling or linking, followed by addition of the monofunctional macroanion A. Characterization was carried out by size exclusion chromatography, low-angle laser light scattering, laser differential refractometry, membrane and vapor pressure osmometry, and NMR and UV spectroscopy. Microphase separation was studied by transmission electron microscopy and small-angle x-ray scattering. Comparison with the corresponding linear block copolymers showed that the macromolecular architecture not only strongly affects the morphological domain borders but can introduce new morphologies as well.

Original language	English (US)
Pages (from-to)	1447-1457
Number of pages	11
Journal	Journal of Macromolecular Science - Pure and Applied Chemistry
Volume	33
Issue number	10
DOIs	https://doi.org/10.1080/10601329608014919
State	Published - 1996
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
General Chemistry
Polymers and Plastics
Materials Chemistry

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10.1080/10601329608014919

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title = "Model nonlinear block copolymers: Synthesis, characterization, morphology",

abstract = "The synthesis of well-defined, near monodisperse, nonlinear block copolymers of the A2B (3-miktoarm star copolymers), A3B (4-miktoarm star copolymers), (AB)2(BA)2 (inversed 4-miktoarm star block copolymers), and A3BA3 (bridged miktoarm star copolymers) types is described. A is polyisoprene (PI) and B is polystyrene (PS). The synthetic approach involves the reaction of methyltrichlorosilane or tetrachlorosilane with monofunctional or difunctional macroanions of B under conditions unfavorable to chain coupling or linking, followed by addition of the monofunctional macroanion A. Characterization was carried out by size exclusion chromatography, low-angle laser light scattering, laser differential refractometry, membrane and vapor pressure osmometry, and NMR and UV spectroscopy. Microphase separation was studied by transmission electron microscopy and small-angle x-ray scattering. Comparison with the corresponding linear block copolymers showed that the macromolecular architecture not only strongly affects the morphological domain borders but can introduce new morphologies as well.",

author = "N. Hadjichristidis and Y. Tselikas and H. Iatrou and V. Efstratiadis and A. Avgeropoylos",

year = "1996",

doi = "10.1080/10601329608014919",

language = "English (US)",

volume = "33",

pages = "1447--1457",

journal = "Journal of Macromolecular Science - Pure and Applied Chemistry",

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number = "10",

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T1 - Model nonlinear block copolymers

T2 - Synthesis, characterization, morphology

AU - Hadjichristidis, N.

AU - Tselikas, Y.

AU - Iatrou, H.

AU - Efstratiadis, V.

AU - Avgeropoylos, A.

PY - 1996

Y1 - 1996

N2 - The synthesis of well-defined, near monodisperse, nonlinear block copolymers of the A2B (3-miktoarm star copolymers), A3B (4-miktoarm star copolymers), (AB)2(BA)2 (inversed 4-miktoarm star block copolymers), and A3BA3 (bridged miktoarm star copolymers) types is described. A is polyisoprene (PI) and B is polystyrene (PS). The synthetic approach involves the reaction of methyltrichlorosilane or tetrachlorosilane with monofunctional or difunctional macroanions of B under conditions unfavorable to chain coupling or linking, followed by addition of the monofunctional macroanion A. Characterization was carried out by size exclusion chromatography, low-angle laser light scattering, laser differential refractometry, membrane and vapor pressure osmometry, and NMR and UV spectroscopy. Microphase separation was studied by transmission electron microscopy and small-angle x-ray scattering. Comparison with the corresponding linear block copolymers showed that the macromolecular architecture not only strongly affects the morphological domain borders but can introduce new morphologies as well.

AB - The synthesis of well-defined, near monodisperse, nonlinear block copolymers of the A2B (3-miktoarm star copolymers), A3B (4-miktoarm star copolymers), (AB)2(BA)2 (inversed 4-miktoarm star block copolymers), and A3BA3 (bridged miktoarm star copolymers) types is described. A is polyisoprene (PI) and B is polystyrene (PS). The synthetic approach involves the reaction of methyltrichlorosilane or tetrachlorosilane with monofunctional or difunctional macroanions of B under conditions unfavorable to chain coupling or linking, followed by addition of the monofunctional macroanion A. Characterization was carried out by size exclusion chromatography, low-angle laser light scattering, laser differential refractometry, membrane and vapor pressure osmometry, and NMR and UV spectroscopy. Microphase separation was studied by transmission electron microscopy and small-angle x-ray scattering. Comparison with the corresponding linear block copolymers showed that the macromolecular architecture not only strongly affects the morphological domain borders but can introduce new morphologies as well.

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DO - 10.1080/10601329608014919

M3 - Article

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EP - 1457

JO - Journal of Macromolecular Science - Pure and Applied Chemistry

JF - Journal of Macromolecular Science - Pure and Applied Chemistry

IS - 10

ER -

Model nonlinear block copolymers: Synthesis, characterization, morphology

Abstract

ASJC Scopus subject areas

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