Experimental methods for in situ studies of morphology development during flow: Instability of thin films.

Jørgen Lyngaae-Jørgensen

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A short overview of in situ methods is given. Multiple laminates of thin films is believed to represent unstable transition structures in many processing operations. A hypotesis for the break up is that first thin cylinders are formed . At a later stage these cylinders break up to spheres.A sandwhich of a thin film( few microns thick) between two very thich layers of another material Is studied by light-scattering during simple shear flow . When the films break up to a final state the sample are shockcooled. The two pase structure is investigated by transmission electron microscopy. A film breakup mechanism involving creation of parallel layers of thin, filmlike formations parallel with the original film is observed. These layers then break up to a final state encompasing nearly spherical drops spread over a thickness much larger (by orders of magnitude) than the original film thickness.
Original languageEnglish
JournalJournal of Macromolecular Science: Part B - Physics
Issue number3&4
Pages (from-to)357-373
Publication statusPublished - 1996
Event1995 Europhysics Conference on Macromolecular Physics - Prag, Czech Republic
Duration: 17 Jul 199520 Jul 1995


Conference1995 Europhysics Conference on Macromolecular Physics
CountryCzech Republic

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