Phase behavior of pure diblocks and binary diblock blends of poly(ethylene)-poly(ethylethylene)

J. Zhao; B. Majumdar; M.F. Schulz; F.S. Bates; K. Almdal; K. Mortensen; D.A. Hajduk; S.M. Gruner

doi:10.1021/ma9507251

Phase behavior of pure diblocks and binary diblock blends of poly(ethylene)-poly(ethylethylene)

J. Zhao, B. Majumdar, M.F. Schulz, F.S. Bates, K. Almdal, K. Mortensen, D.A. Hajduk, S.M. Gruner

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We have determined the phase behavior of a series of model poly(ethylene)-poly-(ethylethylene) (PE-PEE) diblock copolymers with poly(ethylene) block volume fractions (f_PE) ranging from 0.25 to 0.46. Four ordered microstructures make contact with the ODT: spheres arranged on a body-centered cubic lattice (Im3m space group), cylinders packed on a hexagonal lattice, a bicontinuous structure of space group Ia3d, and lamellae. A fifth ordered phase, tentatively identified as hexagonally perforated layers (HPL), separates the cylindrical and lamellar morphologies at moderate or greater degrees of segregation. Binary blends of fPE = 0.37 and 0.46 diblocks were used to investigate the bicontinuous cubic phase region in greater detail; these experiments indicate that this phase extends as much as 100 °C below the ODT for (f_PE) values in the blend from 0.385 to 0.420.

Original language	English
Journal	Macromolecules
Volume	29
Issue number	4
Pages (from-to)	1204-1215
ISSN	0024-9297
DOIs	https://doi.org/10.1021/ma9507251
Publication status	Published - 1996

Access to Document

10.1021/ma9507251

OpenUrl availability

Full text

Cite this

@article{d3495242bf28405b83b99c614c864abb,

title = "Phase behavior of pure diblocks and binary diblock blends of poly(ethylene)-poly(ethylethylene)",

abstract = "We have determined the phase behavior of a series of model poly(ethylene)-poly-(ethylethylene) (PE-PEE) diblock copolymers with poly(ethylene) block volume fractions (fPE) ranging from 0.25 to 0.46. Four ordered microstructures make contact with the ODT: spheres arranged on a body-centered cubic lattice (Im3m space group), cylinders packed on a hexagonal lattice, a bicontinuous structure of space group Ia3d, and lamellae. A fifth ordered phase, tentatively identified as hexagonally perforated layers (HPL), separates the cylindrical and lamellar morphologies at moderate or greater degrees of segregation. Binary blends of fPE = 0.37 and 0.46 diblocks were used to investigate the bicontinuous cubic phase region in greater detail; these experiments indicate that this phase extends as much as 100 °C below the ODT for (fPE) values in the blend from 0.385 to 0.420.",

keywords = "Materialer med s{\ae}rlige fysiske og kemiske egenskaber; Nye funktionelle materialer",

author = "J. Zhao and B. Majumdar and M.F. Schulz and F.S. Bates and K. Almdal and K. Mortensen and D.A. Hajduk and S.M. Gruner",

year = "1996",

doi = "10.1021/ma9507251",

language = "English",

volume = "29",

pages = "1204--1215",

journal = "Macromolecules",

issn = "0024-9297",

publisher = "American Chemical Society",

number = "4",

}

TY - JOUR

T1 - Phase behavior of pure diblocks and binary diblock blends of poly(ethylene)-poly(ethylethylene)

AU - Zhao, J.

AU - Majumdar, B.

AU - Schulz, M.F.

AU - Bates, F.S.

AU - Almdal, K.

AU - Mortensen, K.

AU - Hajduk, D.A.

AU - Gruner, S.M.

PY - 1996

Y1 - 1996

N2 - We have determined the phase behavior of a series of model poly(ethylene)-poly-(ethylethylene) (PE-PEE) diblock copolymers with poly(ethylene) block volume fractions (fPE) ranging from 0.25 to 0.46. Four ordered microstructures make contact with the ODT: spheres arranged on a body-centered cubic lattice (Im3m space group), cylinders packed on a hexagonal lattice, a bicontinuous structure of space group Ia3d, and lamellae. A fifth ordered phase, tentatively identified as hexagonally perforated layers (HPL), separates the cylindrical and lamellar morphologies at moderate or greater degrees of segregation. Binary blends of fPE = 0.37 and 0.46 diblocks were used to investigate the bicontinuous cubic phase region in greater detail; these experiments indicate that this phase extends as much as 100 °C below the ODT for (fPE) values in the blend from 0.385 to 0.420.

AB - We have determined the phase behavior of a series of model poly(ethylene)-poly-(ethylethylene) (PE-PEE) diblock copolymers with poly(ethylene) block volume fractions (fPE) ranging from 0.25 to 0.46. Four ordered microstructures make contact with the ODT: spheres arranged on a body-centered cubic lattice (Im3m space group), cylinders packed on a hexagonal lattice, a bicontinuous structure of space group Ia3d, and lamellae. A fifth ordered phase, tentatively identified as hexagonally perforated layers (HPL), separates the cylindrical and lamellar morphologies at moderate or greater degrees of segregation. Binary blends of fPE = 0.37 and 0.46 diblocks were used to investigate the bicontinuous cubic phase region in greater detail; these experiments indicate that this phase extends as much as 100 °C below the ODT for (fPE) values in the blend from 0.385 to 0.420.

KW - Materialer med særlige fysiske og kemiske egenskaber; Nye funktionelle materialer

U2 - 10.1021/ma9507251

DO - 10.1021/ma9507251

M3 - Journal article

SN - 0024-9297

VL - 29

SP - 1204

EP - 1215

JO - Macromolecules

JF - Macromolecules

IS - 4

ER -

Phase behavior of pure diblocks and binary diblock blends of poly(ethylene)-poly(ethylethylene)

Abstract

Access to Document

OpenUrl availability

Fingerprint

Cite this