Monitoring of Vapor-Induced Phase Separation during Spin Coating of PVDF by Optical Scattering

Solutions of poly(vinylidene fluoride) (PVDF) and dimethyl sulfoxide (DMSO) were spin cast under varying relative humidity environments. To elucidate film formation mechanisms, in situ optical scattering was used to monitor the physical processes occurring during spin coating. SEM micrographs and op...

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Bibliographic Details
Published in:International journal of polymer analysis & characterization 2014-10, Vol.19 (7), p.585-593
Main Authors: Dawson, Noel M., Atencio, Phillip M., Malloy, Kevin J.
Format: Article
Language:English
Subjects:
Chemical compounds
Dimethyl sulfoxide
Humidity
Micrographs
Monitors
Optical monitoring
Optics
Phase separation
Phase seperation
Photomicrographs
Physical properties
Polyvinylidene fluorides
Protective coatings
PVDF
Scanning electron microscopy
Scattering
Spin coating
VIPS
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Summary:Solutions of poly(vinylidene fluoride) (PVDF) and dimethyl sulfoxide (DMSO) were spin cast under varying relative humidity environments. To elucidate film formation mechanisms, in situ optical scattering was used to monitor the physical processes occurring during spin coating. SEM micrographs and optical scattering taken together show that vapor-induced phase separation (VIPS) is a process that controls morphology during spin coating. Time periods were identified in the optical scattering patterns allowing for real time identification of phase separation for greater process control.
ISSN:1023-666X
1563-5341
DOI:10.1080/1023666X.2014.932648