Synthesis and morphological behavior of model 6-miktoarm star copolymers, PS(P2MP) 5, of Styrene (S) and 2-Methyl-1,3-Pentadiene (P2MP)

Anastasios Mavroudis; Apostolos Avgeropoulos; Nikos Hadjichristidis; Edwin L. Thomas; David J. Lohse

doi:10.1021/cm052477l

Synthesis and morphological behavior of model 6-miktoarm star copolymers, PS(P2MP) ₅, of Styrene (S) and 2-Methyl-1,3-Pentadiene (P2MP)

Anastasios Mavroudis, Apostolos Avgeropoulos, Nikos Hadjichristidis^*, Edwin L. Thomas, David J. Lohse

^*Corresponding author for this work

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

23 Scopus citations

Abstract

Three 6-miktoarm star (6μ-star) copolymers [PS(P2MP) ₅] of styrene (S) and 2-methyl-1,3-pentadiene (2MP) were synthesized by anionic polymerization and controlled chlorosilane chemistry, using high vacuum techniques. In all cases [M _w = 103 kg/mol, [S] = 44% (v/v); M _w = 91.1 kg/mol, [S] = 53% (v/v); M _w = 224 kg/mol, [S] = 92% (v/v)] the P2MP exhibited high 1,4-microstructure (∼99%). Molecular characterization (size-exclusion chromatography, membrane osmometry, low-angle laser light scattering, and NMR) revealed high molecular weight/composition homogeneity, and structural analysis (differential scanning calorimetry, transmission electron microscopy, and small-angle X-ray scattering) showed highly ordered patterns. The deviations from predictions based on Milner's morphological model are much more pronounced than that of PS(P2MP) ₂ and PS(P2MP) ₃ miktoarm stars, which we attribute to greater crowding of the arms for these highly branched molecules.

Original language	English (US)
Pages (from-to)	2164-2168
Number of pages	5
Journal	Chemistry of Materials
Volume	18
Issue number	8
DOIs	https://doi.org/10.1021/cm052477l
State	Published - Apr 18 2006
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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@article{0029fc7308c043a3a4e01e7613541532,

title = "Synthesis and morphological behavior of model 6-miktoarm star copolymers, PS(P2MP) 5, of Styrene (S) and 2-Methyl-1,3-Pentadiene (P2MP)",

abstract = "Three 6-miktoarm star (6μ-star) copolymers [PS(P2MP) 5] of styrene (S) and 2-methyl-1,3-pentadiene (2MP) were synthesized by anionic polymerization and controlled chlorosilane chemistry, using high vacuum techniques. In all cases [M w = 103 kg/mol, [S] = 44% (v/v); M w = 91.1 kg/mol, [S] = 53% (v/v); M w = 224 kg/mol, [S] = 92% (v/v)] the P2MP exhibited high 1,4-microstructure (∼99%). Molecular characterization (size-exclusion chromatography, membrane osmometry, low-angle laser light scattering, and NMR) revealed high molecular weight/composition homogeneity, and structural analysis (differential scanning calorimetry, transmission electron microscopy, and small-angle X-ray scattering) showed highly ordered patterns. The deviations from predictions based on Milner's morphological model are much more pronounced than that of PS(P2MP) 2 and PS(P2MP) 3 miktoarm stars, which we attribute to greater crowding of the arms for these highly branched molecules.",

author = "Anastasios Mavroudis and Apostolos Avgeropoulos and Nikos Hadjichristidis and Thomas, {Edwin L.} and Lohse, {David J.}",

year = "2006",

month = apr,

day = "18",

doi = "10.1021/cm052477l",

language = "English (US)",

volume = "18",

pages = "2164--2168",

journal = "Chemistry of Materials",

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T1 - Synthesis and morphological behavior of model 6-miktoarm star copolymers, PS(P2MP) 5, of Styrene (S) and 2-Methyl-1,3-Pentadiene (P2MP)

AU - Mavroudis, Anastasios

AU - Avgeropoulos, Apostolos

AU - Hadjichristidis, Nikos

AU - Thomas, Edwin L.

AU - Lohse, David J.

PY - 2006/4/18

Y1 - 2006/4/18

N2 - Three 6-miktoarm star (6μ-star) copolymers [PS(P2MP) 5] of styrene (S) and 2-methyl-1,3-pentadiene (2MP) were synthesized by anionic polymerization and controlled chlorosilane chemistry, using high vacuum techniques. In all cases [M w = 103 kg/mol, [S] = 44% (v/v); M w = 91.1 kg/mol, [S] = 53% (v/v); M w = 224 kg/mol, [S] = 92% (v/v)] the P2MP exhibited high 1,4-microstructure (∼99%). Molecular characterization (size-exclusion chromatography, membrane osmometry, low-angle laser light scattering, and NMR) revealed high molecular weight/composition homogeneity, and structural analysis (differential scanning calorimetry, transmission electron microscopy, and small-angle X-ray scattering) showed highly ordered patterns. The deviations from predictions based on Milner's morphological model are much more pronounced than that of PS(P2MP) 2 and PS(P2MP) 3 miktoarm stars, which we attribute to greater crowding of the arms for these highly branched molecules.

AB - Three 6-miktoarm star (6μ-star) copolymers [PS(P2MP) 5] of styrene (S) and 2-methyl-1,3-pentadiene (2MP) were synthesized by anionic polymerization and controlled chlorosilane chemistry, using high vacuum techniques. In all cases [M w = 103 kg/mol, [S] = 44% (v/v); M w = 91.1 kg/mol, [S] = 53% (v/v); M w = 224 kg/mol, [S] = 92% (v/v)] the P2MP exhibited high 1,4-microstructure (∼99%). Molecular characterization (size-exclusion chromatography, membrane osmometry, low-angle laser light scattering, and NMR) revealed high molecular weight/composition homogeneity, and structural analysis (differential scanning calorimetry, transmission electron microscopy, and small-angle X-ray scattering) showed highly ordered patterns. The deviations from predictions based on Milner's morphological model are much more pronounced than that of PS(P2MP) 2 and PS(P2MP) 3 miktoarm stars, which we attribute to greater crowding of the arms for these highly branched molecules.

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Synthesis and morphological behavior of model 6-miktoarm star copolymers, PS(P2MP) ₅, of Styrene (S) and 2-Methyl-1,3-Pentadiene (P2MP)

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