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Control of graphene localization in co-continuous PMMA/PS polymer blends via chemical modification for electrical application

Abstract : Nanocomposites containing polymer matrix and graphene appear to be one of the most innovative electrical conductive materials. However, the difficulty to disperse graphene and exfoliate it in polymeric phase forces to incorporate high amounts of graphene to obtain high electrical property. The challenge is to control graphene exfoliation and localization in immiscible polymer blends, in order to reduce its amount while having an improvement of the electrical conductivity. By using polymer blends and controlling the localization of graphene in the blend, the percolation threshold can be decreased [1]. In this context, the present study is focusing on the chemical modification of graphene in order to improve and localize its dispersion into polymer blends. PMMA/PS co-continuous blend was prepared by melt mixing. The continuous interface, which separates the two polymers, will be the future location of graphene to form a percolated network. To exfoliate the graphene and guide the platelets at the interface of the blend during the compounding, oxidation treatments followed by grafting reactions, with PS based copolymers, were performed. As exfoliated graphene grafted with PS (GO-g-PS) has more affinity with PS, it was first dispersed in PMMA, and then PS was added during melt mixing. Hence, the GO-g-PS functionalized graphene migrated to the interface during the process.
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Submitted on : Wednesday, December 8, 2021 - 4:20:37 PM
Last modification on : Friday, December 10, 2021 - 3:06:03 AM

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  • HAL Id : hal-03471052, version 1

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Thibaut Lalire, Belkacem Otazaghine, Claire Longuet, A. Taguet. Control of graphene localization in co-continuous PMMA/PS polymer blends via chemical modification for electrical application. C'Nano 2020 - The Nanoscience Meeting, Nov 2021, Toulouse, France. ⟨hal-03471052⟩

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