Nanocomposite thermoplastic polymer sheets for medical applications

Nick Watzeels, Hubert Rahier, Christophe Block, Guy Van Assche, Bruno Van Mele

Research output: Book/ReportOther report

Abstract

Small scale midi-extruder runs were continued by FYSC on PP in combination with several types of nanoclays.
Several series of samples were made for an optimization of the extrusion process conditions (influence residence time, influence set point temperature, influence loading), a selection of the best nanoclay.

For each nanocomposite prepared by FYSC, the mechanical properties of the samples are tested first. Depending on these properties, selected samples will be studied in more detail. The morphology is studied with Field Emission Gun-Scanning Electron Microscopy (FEG-SEM) and X-ray Diffraction (XRD). The rheological properties are studied with rheometry. The thermal properties and transitions of these selected samples will be examined with Differential Scanning Calorimetry (DSC) and Modulated Temperature DSC (MTDSC). The DSC data will be used for the crystallization kinetics modeling.

Small scale midi-extruder runs were continued by FYSC on PCL in combination with several types of nanoclays and carbon nanotubes (CNT).
Several series of samples were made for an optimization of the extrusion process conditions (influence residence time, influence set point temperature, influence loading), a selection of the best nanoclay and a selection of the best nanotubes.

The crystallization behavior is one of the key factors for the application of these sheet materials, as it will strongly influence the thermoformability of the nanocomposite material. The selected nanocomposites will have a dissimilar crystallization behavior and different thermal and mechanical properties. The physical shape of the materials (e.g., thickness, presence of perforations) will influence the heat transfer to the environment and thus the crystallization behavior.

The crystallization behavior of the nanocomposite sheets will be numerically modeled using the finite element analysis approach. The heat transfer will need to be combined with the crystallization kinetics and will account for the heat developed by the crystallization process itself.
Original languageEnglish
PublisherUnknown
Number of pages22
EditionActivity report October-November 2008
Publication statusPublished - 19 Nov 2008

Keywords

  • thermoplasts
  • nanocomposites
  • morphology
  • crystallisation kinetics

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