Nanostructuration effect on the mechanical properties of PMMA toughened by a triblock acrylate copolymer using multilayer coextrusion
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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). A double level of organization is achieved: the obtained films are made of thousands of alternating continuous nanolayers of each component, while within the nanolayers, MAM is self-assembled with a cylindrical morphology. The mechanical properties of the resulting films were compared to those of virgin PMMA and to classically extruded PMMA/MAM blends with the same compositions where no control of the nanostructure can be achieved. It is shown that significant reinforcement can be obtained with the multilayer films compared to virgin PMMA (on the order of 20 times in terms of fracture toughness) but also compared to classical blends, by a factor from 2 to 4. Reinforcing glassy thermoplastics has been a major industrial challenge due to their usually brittle behavior in the temperature range they are used. This industrially scalable one-step process shows promises for the design of nano-laminated organic glasses with high impact resistance.
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From equilibrium lamellae to out-of-equilibrium cylinders in triblock copolymer nanolayers obtained via multilayer coextrusion MONTANA, Juan-Sebastian; ROLAND, Sébastien; RICHAUD, Emmanuel; MIQUELARD-GARNIER, Guillaume (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) (PMMA). ...
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 ...