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

Bai, W.; Yager, K. G.; Ross, C. A.

doi:10.1016/j.polymer.2016.08.055

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

Journal Article · Fri Aug 19 00:00:00 EDT 2016 · Polymer

DOI:https://doi.org/10.1016/j.polymer.2016.08.055· OSTI ID:1337655

^[1]; Yager, K. G. ^[2]; Ross, C. A. ^[1]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)

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.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC00112704; SC0012704; DMR1419807

OSTI ID:: 1337655

Alternate ID(s):: OSTI ID: 1359790

Report Number(s):: BNL-113318-2016-JA; R&D Project: 32452; KC0403020

Journal Information:: Polymer, Vol. 101, Issue C; ISSN 0032-3861

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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In Situ Tracking of Composition and Morphology of a Diblock Copolymer Film with GISAXS during Exchange of Solvent Vapors at Elevated Temperatures Berezkin, Anatoly V.; Jung, Florian; Posselt, Dorthe Advanced Functional Materials, Vol. 28, Issue 19 https://doi.org/10.1002/adfm.201706226	journal	March 2018
UV-solvent annealing of PDMS-majority and PS-majority PS- b -PDMS block copolymer films Lee, Keehong; Kreider, Melissa; Bai, Wubin Nanotechnology, Vol. 27, Issue 46 https://doi.org/10.1088/0957-4484/27/46/465301	journal	October 2016

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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

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