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Preparation of Flexible and Elastic Poly(trimethylene carbonate) Structures by Stereolithography

Authors

  • Sigrid Schüller-Ravoo,

    1. MIRA Institute for Biomedical Engineering and Technical Medicine, and Department of Biomaterials Science and Technology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
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  • Jan Feijen,

    1. MIRA Institute for Biomedical Engineering and Technical Medicine, and Department of Biomaterials Science and Technology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
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  • Dirk W. Grijpma

    Corresponding author
    1. MIRA Institute for Biomedical Engineering and Technical Medicine, and Department of Biomaterials Science and Technology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
    2. W. J. Kolff Institute, Department of Biomedical Engineering, University Medical Center Groningen and University of Groningen, PO Box 96, 9700 AD Groningen, The Netherlands
    • MIRA Institute for Biomedical Engineering and Technical Medicine, and Department of Biomaterials Science and Technology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands.
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Abstract

3D porous and non-porous structures are designed and prepared by stereolithography using resins based on PTMC macromers. Tough, flexible network films prepared in this manner show E moduli of ≈3.8 MPa and high elongations at break >900%; tensile strengths are ≈4.2 MPa. These values increase with increasing PTMC macromer molecular weight. To reach suitable viscosities for processing, up to 45 wt% propylene carbonate is added as non-reactive diluent. The solid specimens have compression moduli of 3.1–4.2 MPa, similar to the values determined in tensile testing. The built porous structures show porosities of 53–66% and average pore sizes of 309–407 µm. The compression moduli of the porous structures are significantly lower than those of the solid structures.

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