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Title: In situ GISAXS study of a Si-containing block copolymer under solvent vapor annealing: Effects of molecular weight and solvent vapor composition

Abstract

The room-temperature solvent vapor annealing of polystyrene-b-polydimethylsiloxane (PS-b-PDMS) block copolymer films was studied in situ by grazing incidence small-angle X-ray scattering. Films of cylinder-forming PS-b-PDMS with molecular weight 16 kg/mol and 12.2 kg/mol, annealed under vapors of toluene:heptane with varying composition, exhibited swelling-ratio-dependent evolution of microdomain spacing and orientation. In a vapor made from a toluene:heptane 5:1 volumetric ratio liquid mixture, or from pure toluene, cylindrical microdomains reoriented from majority out-of-plane to in-plane during annealing, while drying led to shrinkage along the film normal and a large distortion of the hexagonal lattice of in-plane cylinders. As a result, annealing under vapor from a toluene:heptane 1:5 volumetric ratio liquid produced a non-bulk lamellar structure in the 16 kg/mol PS-b-PDMS.

Authors:
ORCiD logo [1];  [2];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1337655
Alternate Identifier(s):
OSTI ID: 1359790
Report Number(s):
BNL-113318-2016-JA
Journal ID: ISSN 0032-3861; R&D Project: 32452; KC0403020
Grant/Contract Number:  
SC00112704; SC0012704; DMR1419807
Resource Type:
Accepted Manuscript
Journal Name:
Polymer
Additional Journal Information:
Journal Volume: 101; Journal Issue: C; Journal ID: ISSN 0032-3861
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; block copolymer; self-assembly; ordering; Center for Functional Nanomaterials; in situ

Citation Formats

Bai, W., Yager, K. G., and Ross, C. A. In situ GISAXS study of a Si-containing block copolymer under solvent vapor annealing: Effects of molecular weight and solvent vapor composition. United States: N. p., 2016. Web. https://doi.org/10.1016/j.polymer.2016.08.055.
Bai, W., Yager, K. G., & Ross, C. A. In situ GISAXS study of a Si-containing block copolymer under solvent vapor annealing: Effects of molecular weight and solvent vapor composition. United States. https://doi.org/10.1016/j.polymer.2016.08.055
Bai, W., Yager, K. G., and Ross, C. A. Fri . "In situ GISAXS study of a Si-containing block copolymer under solvent vapor annealing: Effects of molecular weight and solvent vapor composition". United States. https://doi.org/10.1016/j.polymer.2016.08.055. https://www.osti.gov/servlets/purl/1337655.
@article{osti_1337655,
title = {In situ GISAXS study of a Si-containing block copolymer under solvent vapor annealing: Effects of molecular weight and solvent vapor composition},
author = {Bai, W. and Yager, K. G. and Ross, C. A.},
abstractNote = {The room-temperature solvent vapor annealing of polystyrene-b-polydimethylsiloxane (PS-b-PDMS) block copolymer films was studied in situ by grazing incidence small-angle X-ray scattering. Films of cylinder-forming PS-b-PDMS with molecular weight 16 kg/mol and 12.2 kg/mol, annealed under vapors of toluene:heptane with varying composition, exhibited swelling-ratio-dependent evolution of microdomain spacing and orientation. In a vapor made from a toluene:heptane 5:1 volumetric ratio liquid mixture, or from pure toluene, cylindrical microdomains reoriented from majority out-of-plane to in-plane during annealing, while drying led to shrinkage along the film normal and a large distortion of the hexagonal lattice of in-plane cylinders. As a result, annealing under vapor from a toluene:heptane 1:5 volumetric ratio liquid produced a non-bulk lamellar structure in the 16 kg/mol PS-b-PDMS.},
doi = {10.1016/j.polymer.2016.08.055},
journal = {Polymer},
number = C,
volume = 101,
place = {United States},
year = {2016},
month = {8}
}

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Cited by: 1 work
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    Works referencing / citing this record:

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