Intradomain Textures in Block Copolymers: Multizone Alignment and Biaxiality
Abstract
Block copolymer (BCP) melt assembly has been studied for decades, focusing largely on self-organized spatial patterns of periodically ordered segment density. Here, we demonstrate that underlying the well-known composition profiles (i.e., ordered lamella, cylinders, spheres, and networks) are generic and heterogeneous patterns of segment orientation that couple strongly to morphology, even in the absence of specific factors that promote intra or interchain segment alignment. We employ both self-consistent field theory and coarse-grained simulation methods to measure polar and nematic order parameters of segments in a freely jointed chain model of diblock melts. We show that BCP morphologies have a multizone texture, with segments predominantly aligned normal and parallel to interdomain interfaces in the respective brush and interfacial regions of the microdomain. Further, morphologies with anisotropically curved interfaces (i.e., cylinders and networks) exhibit biaxial order that is aligned to the principal curvature axes of the interface.
- Authors:
-
- Univ. of Massachusetts, Amherst, MA (United States). Dept. of Chemical Engineering
- The Ohio State Univ., Columbus, OH (United States). William G. Lowrie Dept. of Chemical and Biomolecular Engineering
- Univ. of Massachusetts, Amherst, MA (United States). Dept. of Polymer Science and Engineering
- Publication Date:
- Research Org.:
- Univ. of Massachusetts, Amherst, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1536518
- Alternate Identifier(s):
- OSTI ID: 1363721
- Grant/Contract Number:
- SC0014549
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 118; Journal Issue: 24; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Prasad, Ishan, Seo, Youngmi, Hall, Lisa M., and Grason, Gregory M. Intradomain Textures in Block Copolymers: Multizone Alignment and Biaxiality. United States: N. p., 2017.
Web. doi:10.1103/physrevlett.118.247801.
Prasad, Ishan, Seo, Youngmi, Hall, Lisa M., & Grason, Gregory M. Intradomain Textures in Block Copolymers: Multizone Alignment and Biaxiality. United States. https://doi.org/10.1103/physrevlett.118.247801
Prasad, Ishan, Seo, Youngmi, Hall, Lisa M., and Grason, Gregory M. 2017.
"Intradomain Textures in Block Copolymers: Multizone Alignment and Biaxiality". United States. https://doi.org/10.1103/physrevlett.118.247801. https://www.osti.gov/servlets/purl/1536518.
@article{osti_1536518,
title = {Intradomain Textures in Block Copolymers: Multizone Alignment and Biaxiality},
author = {Prasad, Ishan and Seo, Youngmi and Hall, Lisa M. and Grason, Gregory M.},
abstractNote = {Block copolymer (BCP) melt assembly has been studied for decades, focusing largely on self-organized spatial patterns of periodically ordered segment density. Here, we demonstrate that underlying the well-known composition profiles (i.e., ordered lamella, cylinders, spheres, and networks) are generic and heterogeneous patterns of segment orientation that couple strongly to morphology, even in the absence of specific factors that promote intra or interchain segment alignment. We employ both self-consistent field theory and coarse-grained simulation methods to measure polar and nematic order parameters of segments in a freely jointed chain model of diblock melts. We show that BCP morphologies have a multizone texture, with segments predominantly aligned normal and parallel to interdomain interfaces in the respective brush and interfacial regions of the microdomain. Further, morphologies with anisotropically curved interfaces (i.e., cylinders and networks) exhibit biaxial order that is aligned to the principal curvature axes of the interface.},
doi = {10.1103/physrevlett.118.247801},
url = {https://www.osti.gov/biblio/1536518},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 24,
volume = 118,
place = {United States},
year = {Mon Jun 12 00:00:00 EDT 2017},
month = {Mon Jun 12 00:00:00 EDT 2017}
}
Web of Science
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Works referencing / citing this record:
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