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Production of microcellular PMMA using the bead foaming technology

Wednesday (24.10.2018)
19:12 - 19:15
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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One of the most widely used methods to produce microcellular poly(methyl methacrylate) (PMMA) at the laboratory scale is the gas dissolution foaming process. Currently, this technique allows producing small samples with simple geometries. In addition, it requires very long saturation times (even more than 20 hours for a sample 4 mm thick). These facts make this foaming technique a good method to test formulations and materials at the laboratory scale but with low possibilities of being scaled up to mass production.


One interesting alternative based on similar principles to the pervious explained technology is the bead foaming technology. Foams made of beads are formed by a large number of expanded beads which are welded together by heat giving rise to a perfectly defined three-dimensional material. One important characteristic of this technology is that allows obtaining foams with complicated geometries. This technology is currently used at industrial scale to produced EPS , EPP or ETPU. Moreover, due to the small size of the precursors (also called micro-pellets) used, the saturation time is drastically reduced (less than 2 hours for a 1 mm thick micro-pellet).


In this work, PMMA microcellular beads have been produced using a one-step gas dissolution foaming process in an autoclave using CO2 as blowing agent. The influence of foaming conditions such as saturation temperature and saturation pressure on the cellular morphology and bead density has been analysed. Different saturation temperatures (50 ℃, 55 ℃ and 60 ℃) and saturation pressures (10 MPa, 15 MPa and 20 MPa) have been used. Different grades of PMMA have been also analysed.

Mikel Mugica
University of Valladolid
Additional Authors:
  • Victoria Bernardo
    University of Valladolid
  • Judith Martín de Léon
    University of Valladolid
  • Dr. Cristina Saiz-Arroyo
    CellMat Technologies S.L
  • Prof. Dr. Miguel Ángel Rodríguez-Pérez
    University of Valladolid