期刊
MACROMOLECULES
卷 48, 期 23, 页码 8574-8584出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.5b02174
关键词
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资金
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- C-SPIN, a STARnet Center of the SRC - DARPA
- MARCO
- Taiwan Semiconductor Manufacturing Corp.
- Tokyo Electron
- MRSEC [DMR1419807]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1246740] Funding Source: National Science Foundation
Grazing incidence X-ray scattering was used to follow the microphase separation during room-temperature solvent annealing of films of high interaction parameter cylinder-forming 16 kg/mol polystyrene-b-polydimethylsiloxane block copolymer in a toluene heptane mixed solvent vapor. Microphase separation was observed for swelling ratios above 1.2, but swelling ratios above 1.9 caused the films to disorder. The films exhibited a thickness-dependent microdomain reorientation during annealing, with the initial out-of-plane cylinder orientation converting to an in-plane orientation as a result of preferential surface interactions. Drying led to a reduction in the out-of-plane cylinder spacing, with slower drying leading to greater deswelling and larger distortion of the hexagonal lattice.
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