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View Journal Article: High-Throughput Measurement of Polymer Blend Phase Behavior Citation: Meredith, J. Carson, Karim, Alamgir and Amis, Eric (2000). High-Throughput Measurement of Polymer Blend Phase Behavior. Macromolecules 33 (16). 5760-5762. Collection: Polymer Publications     Attached Files Name Description MIMEType Size Downloads Meredith_et_al_Macromolecules_2000_b.pdf   Meredith_et_al_Macromolecules_2000_b.pdf application/pdf 168.18KB 0 Title High-Throughput Measurement of Polymer Blend Phase Behavior Author(s) Meredith, J. Carson Karim, Alamgir Amis, Eric Keyword(s) combinatorial methods combinatorial methods polystyrene PS poly(vinyl methyl ether) PVME thin films dewetting Abstract/Summary Combinatorial methods involving data collection in multiparameter space allow a rapid identification of measured property trends as a function of system parameters. The technique has been applied with success to pharmaceutical, inorganic and organic materials synthesis, but not significantly to measurements of polymeric films and coatings. We demonstrate the use of 2-D combinatorial libraries to investigate thin-film dewetting. We have prepared libraries of thin films of polystyrene on silicon substrates containing orthogonal, continuous variations of thickness (h), and temperature (T) that represent about 1200 practical state points per library. The libraries were screened for dewetting behavior using automated optical microscopy. Dewetting trends were visibly apparent on the libraries, and a comprehensive map of the T, h, and time (t) dependence was generated in a few hours. The combinatorial libraries, spanning a large T, h, and t range, not only reproduced known dewetting structures and phenomena but also enabled a novel T, h superposition of the heterogeneous nucleated hole dewetting kinetics. We observed three hole nucleation regimes as a function of thickness: heterogeneously nucleated holes (h > 55 nm), a crossover regime where both heterogeneous and capillary instability nucleation compete (33 nm < h < 55 nm), and a regime of holes nucleated by capillary instability (16 nm < h < 33 nm). Publisher American Chemical Society Date 2000-01-01 Copyright Notice http://www.nist.gov/public_affairs/disclaim.htm Journal Macromolecules Volume 33 Pages 5760-5762 Issue 16 Copyright Agreement on Additional Notes Macromolecules 2000, 33(16), 5760-5762; Sponsorship: NRC Postdoctoral Research Associateship   User Comments   Created: Tue, 31 Oct 2006, 00:58:01 EST Detailed History

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