Morphological behavior of ASB miktoarm star block copolymers

Frederick L. Beyer; Samuel P. Gido; Gabriel Velis; Nikos Hadjichristidis; Nora Beck Tan

doi:10.1021/ma9909713

Morphological behavior of ASB miktoarm star block copolymers

Frederick L. Beyer^*, Samuel P. Gido, Gabriel Velis, Nikos Hadjichristidis, Nora Beck Tan

^*Corresponding author for this work

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

62 Scopus citations

Abstract

A morphological study of three AsB, six-arm miktoarm star block copolymers is presented. The miktoarm stars are comprised of five arms of polyisoprene and one arm of polystyrene joined together at a single junction point. The strong segregation limit theory for the morphological behavior of miktoarm stars predicts that these materials should form cylindrical (two samples) and lamellar (one sample) morphologies, but only lamellar morphologies were observed by TEM and SAXS. These results are similar to previously reported discrepancies between miktoarm star morphological behavior and the predictions of the theory. Combining the data of this study with that of previous morphological studies of miktoarm star materials, we can track the increasing discrepancy between the experimentally observed morphology and theoretical predictions as the molecular asymmetry parameter, e, increases. The AsB materials in this study were also observed to form exceptionally well-ordered morphologies.

Original language	English (US)
Pages (from-to)	6604-6607
Number of pages	4
Journal	Macromolecules
Volume	32
Issue number	20
DOIs	https://doi.org/10.1021/ma9909713
State	Published - Oct 5 1999
Externally published	Yes

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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title = "Morphological behavior of ASB miktoarm star block copolymers",

abstract = "A morphological study of three AsB, six-arm miktoarm star block copolymers is presented. The miktoarm stars are comprised of five arms of polyisoprene and one arm of polystyrene joined together at a single junction point. The strong segregation limit theory for the morphological behavior of miktoarm stars predicts that these materials should form cylindrical (two samples) and lamellar (one sample) morphologies, but only lamellar morphologies were observed by TEM and SAXS. These results are similar to previously reported discrepancies between miktoarm star morphological behavior and the predictions of the theory. Combining the data of this study with that of previous morphological studies of miktoarm star materials, we can track the increasing discrepancy between the experimentally observed morphology and theoretical predictions as the molecular asymmetry parameter, e, increases. The AsB materials in this study were also observed to form exceptionally well-ordered morphologies.",

author = "Beyer, {Frederick L.} and Gido, {Samuel P.} and Gabriel Velis and Nikos Hadjichristidis and Tan, {Nora Beck}",

year = "1999",

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TY - JOUR

T1 - Morphological behavior of ASB miktoarm star block copolymers

AU - Beyer, Frederick L.

AU - Gido, Samuel P.

AU - Velis, Gabriel

AU - Hadjichristidis, Nikos

AU - Tan, Nora Beck

PY - 1999/10/5

Y1 - 1999/10/5

N2 - A morphological study of three AsB, six-arm miktoarm star block copolymers is presented. The miktoarm stars are comprised of five arms of polyisoprene and one arm of polystyrene joined together at a single junction point. The strong segregation limit theory for the morphological behavior of miktoarm stars predicts that these materials should form cylindrical (two samples) and lamellar (one sample) morphologies, but only lamellar morphologies were observed by TEM and SAXS. These results are similar to previously reported discrepancies between miktoarm star morphological behavior and the predictions of the theory. Combining the data of this study with that of previous morphological studies of miktoarm star materials, we can track the increasing discrepancy between the experimentally observed morphology and theoretical predictions as the molecular asymmetry parameter, e, increases. The AsB materials in this study were also observed to form exceptionally well-ordered morphologies.

AB - A morphological study of three AsB, six-arm miktoarm star block copolymers is presented. The miktoarm stars are comprised of five arms of polyisoprene and one arm of polystyrene joined together at a single junction point. The strong segregation limit theory for the morphological behavior of miktoarm stars predicts that these materials should form cylindrical (two samples) and lamellar (one sample) morphologies, but only lamellar morphologies were observed by TEM and SAXS. These results are similar to previously reported discrepancies between miktoarm star morphological behavior and the predictions of the theory. Combining the data of this study with that of previous morphological studies of miktoarm star materials, we can track the increasing discrepancy between the experimentally observed morphology and theoretical predictions as the molecular asymmetry parameter, e, increases. The AsB materials in this study were also observed to form exceptionally well-ordered morphologies.

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U2 - 10.1021/ma9909713

DO - 10.1021/ma9909713

M3 - Article

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SP - 6604

EP - 6607

JO - Macromolecules

JF - Macromolecules

IS - 20

ER -

Morphological behavior of ASB miktoarm star block copolymers

Abstract

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