Synthesis and morphological behavior of model linear and miktoarm star copolymers of 2-methyl-1,3-pentadiene and styrene

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

doi:10.1021/cm021360j

Synthesis and morphological behavior of model linear and miktoarm star copolymers of 2-methyl-1,3-pentadiene and styrene

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

67 Scopus citations

Abstract

Three linear diblock copolymers (PS-b-P2MP), two 3-miktoarm [PS(P2MP)₂] copolymers, and two 4-miktoarm star copolymers [PS(P2MP)₃] of styrene (S) and 2-methyl-1,3-pentadiene (2MP) were synthesized by anionic polymerization/high vacuum techniques and controlled chlorosilane chemistry. Molecular characterization of the samples was carried out by size exclusion chromatography (SEC), membrane osmometry (MO), low-angle laser light scattering (LALLS), and ¹H NMR spectroscopy, and indicated a high degree of molecular and compositional homogeneity. All samples had approximately the same total M̄_w (∼100 000), different compositions, and high 1,4-microstructure for the P2MP blocks. The morphological behavior was determined via transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), and differential scanning calorimetry (DSC). The experimental results were compared with those found for PS/PI block copolymer systems and with Milner's theoretical prediction. Significant discrepancies were found. Also, it is the first time that two morphologies (lamellae/double gyroid) coexist in a neat material, and especially in a 4-miktoarm star copolymer.

Original language	English (US)
Pages (from-to)	1976-1983
Number of pages	8
Journal	Chemistry of Materials
Volume	15
Issue number	10
DOIs	https://doi.org/10.1021/cm021360j
State	Published - May 20 2003
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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title = "Synthesis and morphological behavior of model linear and miktoarm star copolymers of 2-methyl-1,3-pentadiene and styrene",

abstract = "Three linear diblock copolymers (PS-b-P2MP), two 3-miktoarm [PS(P2MP)2] copolymers, and two 4-miktoarm star copolymers [PS(P2MP)3] of styrene (S) and 2-methyl-1,3-pentadiene (2MP) were synthesized by anionic polymerization/high vacuum techniques and controlled chlorosilane chemistry. Molecular characterization of the samples was carried out by size exclusion chromatography (SEC), membrane osmometry (MO), low-angle laser light scattering (LALLS), and 1H NMR spectroscopy, and indicated a high degree of molecular and compositional homogeneity. All samples had approximately the same total {\=M}w (∼100 000), different compositions, and high 1,4-microstructure for the P2MP blocks. The morphological behavior was determined via transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), and differential scanning calorimetry (DSC). The experimental results were compared with those found for PS/PI block copolymer systems and with Milner's theoretical prediction. Significant discrepancies were found. Also, it is the first time that two morphologies (lamellae/double gyroid) coexist in a neat material, and especially in a 4-miktoarm star copolymer.",

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

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T1 - Synthesis and morphological behavior of model linear and miktoarm star copolymers of 2-methyl-1,3-pentadiene and styrene

AU - Mavroudis, Anastasios

AU - Avgeropoulos, Apostolos

AU - Hadjichristidis, Nikos

AU - Thomas, Edwin L.

AU - Lohse, David J.

PY - 2003/5/20

Y1 - 2003/5/20

N2 - Three linear diblock copolymers (PS-b-P2MP), two 3-miktoarm [PS(P2MP)2] copolymers, and two 4-miktoarm star copolymers [PS(P2MP)3] of styrene (S) and 2-methyl-1,3-pentadiene (2MP) were synthesized by anionic polymerization/high vacuum techniques and controlled chlorosilane chemistry. Molecular characterization of the samples was carried out by size exclusion chromatography (SEC), membrane osmometry (MO), low-angle laser light scattering (LALLS), and 1H NMR spectroscopy, and indicated a high degree of molecular and compositional homogeneity. All samples had approximately the same total M̄w (∼100 000), different compositions, and high 1,4-microstructure for the P2MP blocks. The morphological behavior was determined via transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), and differential scanning calorimetry (DSC). The experimental results were compared with those found for PS/PI block copolymer systems and with Milner's theoretical prediction. Significant discrepancies were found. Also, it is the first time that two morphologies (lamellae/double gyroid) coexist in a neat material, and especially in a 4-miktoarm star copolymer.

AB - Three linear diblock copolymers (PS-b-P2MP), two 3-miktoarm [PS(P2MP)2] copolymers, and two 4-miktoarm star copolymers [PS(P2MP)3] of styrene (S) and 2-methyl-1,3-pentadiene (2MP) were synthesized by anionic polymerization/high vacuum techniques and controlled chlorosilane chemistry. Molecular characterization of the samples was carried out by size exclusion chromatography (SEC), membrane osmometry (MO), low-angle laser light scattering (LALLS), and 1H NMR spectroscopy, and indicated a high degree of molecular and compositional homogeneity. All samples had approximately the same total M̄w (∼100 000), different compositions, and high 1,4-microstructure for the P2MP blocks. The morphological behavior was determined via transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), and differential scanning calorimetry (DSC). The experimental results were compared with those found for PS/PI block copolymer systems and with Milner's theoretical prediction. Significant discrepancies were found. Also, it is the first time that two morphologies (lamellae/double gyroid) coexist in a neat material, and especially in a 4-miktoarm star copolymer.

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DO - 10.1021/cm021360j

M3 - Article

AN - SCOPUS:0037837478

SN - 0897-4756

VL - 15

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JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 10

ER -

Synthesis and morphological behavior of model linear and miktoarm star copolymers of 2-methyl-1,3-pentadiene and styrene

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