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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Tailoring the Morphology of Microcellular Polymer Foams
 Nistor, A. ; Rygl, A. ; Sajfrtová, Marie ; Toulec, M. ; Vonka, M. ; Kosek, J.
In this work, we focus on polymer foams with improved heat and/or sound insulation properties, in particular on microcellular foams with the cell sizes below 10 μm. By decreasing the cell size below 10 μm or even lower we can highly improve the foam heat and sound insulation properties. Depending on the foam structure (open-, closed-cell or dentritic) the foam application can vary. The structure-property relation is thus of great interest as well as the preparation of foams with various morphologies and scale-up of the manufacturing of microcellular foams.
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Microcellular Polystyrene Foam Preparation Using High Pressure CO2
 Nistor, A. ; Rygl, A. ; Bobák, M. ; Sajfrtová, Marie ; Kosek, J.
We prepared PS microcellular foams from PS films using high pressure CO2 as the blowing and nucleating agent. The PS film samples were prepared by a custom-built dipcoating apparatus using toluene as the solvent. We studied the influence of the foaming conditions (pressure, temperature, pressure release rate) on the resulting foam structure, which was analysed by X-ray micro-computed tomography (micro-CT), SEM and AFM.
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