Dewetting Dynamics of Sheared Thin Polymer Films: An Experimental Study
Article dans une revue avec comité de lecture
JournalACS Macro Letters
An experimental investigation is reported on the effect of shear on the bursting of molten ultrathin polymer films embedded in an immiscible matrix. By use of an optical microscope coupled with a shearing hot stage, the dewetting dynamics, i.e., the growth of dewetting holes, is monitored over time at various shear rates. It is observed that their circularity is modified by shear and that for all temperatures and thicknesses studied the growth speed of the formed holes rapidly increases with increasing shear rate. A model balancing capillary forces and viscous dissipation while taking into account shear thinning is then proposed and captures the main features of the experimental data, such as the ellipsoid shape of the holes and the faster dynamics in the direction parallel to the shear. This research will help to understand the instabilities occurring during processing of layered polymeric structures, such as multilayer coextrusion.
Files in this item
Showing items related by title, author, creator and subject.
Article dans une revue avec comité de lectureKADRI, Kheireddin; PEIXINHO, Jorge; SALEZ, Thomas; MIQUELARD-GARNIER, Guillaume; SOLLOGOUB, Cyrille (Elsevier BV, 2021)The objective of this work is to give new insight into the stability of thin polymer films under shear, in order to pave the way to a better control of the nanolayer coextrusion process. To do so, a finite-difference ...
Article dans une revue avec comité de lectureLOZAY, Quentin; BEUGUEL, Quentin; FOLLAIN, Nadège; LEBRUN, Laurent; GUINAULT, Alain; MIQUELARD-GARNIER, Guillaume; TENCÉ-GIRAULT, Sylvie; SOLLOGOUB, Cyrille; DARGENT, Eric; MARAIS, Stéphane (MDPI, 2021)The barrier performance and structural lightening of organic materials are increasingly desired and constitute a major challenge for manufacturers, particularly for transport and packaging. A promising technique which tends ...
Breakup behavior of nanolayers in polymeric multilayer systems — Creation of nanosheets and nanodroplets Article dans une revue avec comité de lectureFENG, Jingxing; BAER, Eric; OLAH, Andrew; SOLLOGOUB, Cyrille; MIQUELARD-GARNIER, Guillaume; GUINAULT, Alain; BIRONEAU, Adrien; ZHANG, Ziyou (Elsevier, 2018)Multilayer films comprising polystyrene (PS)/polymethyl methalcrylate (PMMA) and PS/polycaprolatone (PCL) alternating nanolayers with varied layer thickness were fabricated by multilayer coextrusion. The nanolayers breakup ...
Article dans une revue avec comité de lectureROLAND, Sébastien; MIQUELARD-GARNIER, Guillaume; GERVAIS, Matthieu; GUINAULT, Alain; SOLLOGOUB, , Cyrille (Elsevier, 2016)We report the making of multilayered self-assembled films by coextrusion, composed of alternated layers of confining polycarbonate and confined poly(styrene-. b-butadiene-. b-methyl methacrylate), whose blocks are chemically ...
Dispersion of carbon nanotubes in polypropylene via multilayer coextrusion: Influence on the mechanical properties Article dans une revue avec comité de lectureMIQUELARD-GARNIER, Guillaume; GUINAULT, Alain; FROMONTEIL, D; DELALANDE, S; SOLLOGOUB, Cyrille (Elsevier, 2013)Multilayer coextrusion was used to disperse Carbon Nanotubes (CNT) in polypropylene (PP). The dilution of commercially available masterbatches using a twin-screw extruder was first applied to produce several formulations, ...