From equilibrium lamellae to out-of-equilibrium cylinders in triblock copolymer nanolayers obtained via multilayer coextrusion
TypeArticles dans des revues avec comité de lecture
Multilayer coextrusion was used to obtain nanolayered films of self-assembled commercial triblock copolymer poly(methyl methacrylate-b-butyl acrylate-b-methyl methacrylate) (MAM) confined by poly(methyl methacrylate) (PMMA). The MAM layer thickness was varied from 30 nm to 500 nm (i.e. roughly 1 to 15–20 nanodomains) by changing either the number of multiplying elements or the chill roll draw ratio. The as-extruded triblock morphology within the layers was identified as cylindrical using transmission electronic microscopy (TEM) and small-angle X-ray scattering (SAXS). Surprisingly, this differs from the lamellar morphology identified at equilibrium in bulk and thin films for this triblock. Moreover, as the triblock layer thickness is decreased, the triblock morphology is constrained into a preferential orientation. Slightly different packings were observed on films with similar layer thicknesses but achieved with different processing routes. This one-step and industrially scalable method allowing long-range control of the self-assembly is of interest for engineering applications with large quantity of materials needed.
Showing items related by title, author, creator and subject.
Nanostructuration effect on the mechanical properties of PMMA toughened by a triblock acrylate copolymer using multilayer coextrusion MONTANA, Juan-Sebastian; MIQUELARD-GARNIER, Guillaume; RICHAUD, Emmanuel; ROLAND, SEBASTIEN (Elsevier, 2018)Multilayer coextrusion was used to obtain nanolayered films of self-assembled commercial triblock copolymer poly(methyl methacrylate-b-butyl acrylate-b-methyl methacrylate) (MAM) confined by poly (methyl methacrylate) ...
MONTANA, Juan Sebastian; ROLAND, Sébastien; MIQUELARD GARNIER, Guillaume; RICHAUD, Emmanuel (Elsevier, 2017)This paper reports an investigation of the thermal degradation of a poly(styrene-b-butadiene-b-methyl methacrylate) triblock terpolymer compared with those of butadiene rubbers and poly(styrene-b-methyl methacrylate). ...
BIRONEAU, Adrien; DIRRENBERGER, Justin; SOLLOGOUB, Cyrille; MIQUELARD-GARNIER, Guillaume; ROLAND, Sébastien (Wiley, 2016)The size of representative microstructural samples obtained from atomic force microscopy is addressed in this paper. The case of an archetypal one-dimensional nanolayered polymer blend is considered. Image analysis is ...
Dispersion of carbon nanotubes in polypropylene via multilayer coextrusion: Influence on the mechanical properties MIQUELARD-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, ...
Confinement effect in PC/MXD6 multilayer films: Impact of the microlayered structure on water and gas barrier properties MESSIN, Tiphaine; FOLLAIN, Nadège; GUINAULT, Alain; MIQUELARD-GARNIER, Guillaume; SOLLOGOUB, Cyrille; DELPOUVE, Nicolas; GAUCHER, Valérie; MARAIS, Stéphane (Elsevier, 2017)The transport properties were specifically investigated from water and gas permeation kinetics, and the corresponding permeation parameters were determined. The confinement effect of MXD6 in the multilayer structure was ...