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Nanocellular polymers based on PMMA/sepiolite nanocomposites: characterization of the mechanical behaviour

Wednesday (24.10.2018)
19:24 - 19:27
Part of:
- Poster Battery housings for electric vehicles using CFRP and aluminium foam 0 Joachim Baumeister
- Poster Manufacturing and characterization of open-cell stainless steel foams by investment casting 1 Jan Frömert
- Poster Interface formation of Mg2X (X = Si, Sn) in cellular Si infiltrated by Mg(Sn) alloys 1 Alexander M. Matz
- Poster Production of microcellular PMMA using the bead foaming technology 1 Mikel Mugica
- Poster Nanocellular PMMA with tunable cellular structure by changing the rheological behaviour of the polymer matrix. 1 Judith Martín de León
- Poster Production of thermoplastic polyurethane foams synthesized with different contents of hard segment and graphene nanoplatelets by the gas dissolution foaming process 1 Ph.D. Mercedes Santiago-Calvo
- Poster Surface functionalized filters for aluminum melt filtration 1 Dr.-Ing. Claudia Voigt
- Poster Nanocellular polymers based on PMMA/sepiolite nanocomposites: characterization of the mechanical behaviour 1 Victoria Bernardo
- Poster Impact resistant foams based on PP/POE blends 1 Ph.D. Santiago Munoz Pascual
- Poster Crosslinked open cell ethylene butyl acrylate copolymer (EBA) foams: properties and applications 1 Ph.D. Eduardo López
- Poster Influence of molecular weight in the solubility,diffusivity and the subsequent cellular structure of polystyrene foams 1 Ph.D. Alberto Ballesteros
- Poster Crushing strength measurement at reticulated ceramic foams ex situ and in situ CT analysis 1 Dr.-Ing. Claudia Voigt
- Poster Initiation of plateau region during compression test of porous metals with aligned unidirectional pores 1 Tomoya Tamai
- Poster Active meta-materials with adjustable pore size 1 Dr. Reza Hedayati
- Poster Polymeric foams 3D numerical mechanical modelling 1 Stefano Tagliabue
- Poster Characterisation of NiTi cellular materials fabricated by the powder-metallurgy spaceholder technique 1 Dr. Karl Dahm
- Poster Accurate separation of open cell metal foams using remote laser cutting technique 1 Robert Baumann
- Poster Generation of artificial foam structures and evaluation of their thermo-mechanical, flow and filtration characteristics (Poster) 1 Christoph Settgast
- Poster Surface modification of magnesium-based foams by Directed Plasma Nanosynthesis 1 Viviana Marcela Posada Pérez

General Topic P: Postersession
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The addition of inorganic fillers in the nanometric scale to a polymer matrix is a common strategy to improve the mechanical behaviour of a cellular polymer [1]. Moreover, the nanometric size of the fillers can be profited as nucleating agent for the production of micro and nanocellular polymers [2]. Nanocellular polymers are characterized by cell sizes in the range of tens to hundreds of nanometers. They have aroused great interest due to their unique combination of properties, such as a very low thermal conductivity, cell sizes useful for ultrafiltration and their semi-transparent behaviour [3].

In this work, needle-like sepiolites are used as a nucleating agent to produce nanocellular PMMA with a bimodal cellular structure [4]. Cellular materials with different sepiolite contents (from 1 to 5 wt%) and different relative densities (ranging 0.3 - 0.5) are produced by the gas dissolution foaming. Mechanical properties in compression and fracture toughness behaviour are analyzed.

The results show that the addition of sepiolites produces a significant improvement in the compression properties of the solid nanocomposites. The elastic modulus of the cellular materials is shown to increase at high densities when sepiolites are included, and the reinforcement is greater than that observed in the solids. Also, fracture toughness decreases with the amount of sepiolites in the solid nanocomposites. However, cellular materials with and without sepiolites behave similarly, so cellular nanocomposites show improved relative fracture toughness compared with the pure PMMA. All these improvements are attributed to a synergetic effect between the addition of the particles and the presence of a cellular structure, due to a combination of an improved dispersion induced by the foaming process and the location of the aggregates inside the microcellular pores, isolated from the solid phase.


1. Ibeh, C. C., Bubacz, M. Journal of Cellular Plastics 2008, 44, 493–515.

2. Costeux, S., Zhu, L. Polymer 2013, 54 (11), 2785–2795.

3. Notario, B., Pinto, J., Rodriguez-Perez, M. A. Progress in Polymer Science 2016, 78–79, 93–139.

4. Bernardo, V., Martin-de León, J., Laguna-Gutiérrez, E., Rodríguez-Pérez, M. Á. European Polymer Journal 2017, 96, 10–26.

Victoria Bernardo
University of Valladolid
Additional Authors:
  • Judith Martin de-Leon
    University of Valladolid
  • Frederik Van Loock
    University of Cambridge
  • Prof. Dr. Norman Fleck
    University of Cambridge
  • Paula Cimavilla-Roman
    University of Valladolid
  • Saul Perez-Tamarit
    University of Valladolid
  • Prof. Dr. Miguel Angel Rodriguez-Perez
    University of Valladolid