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  • Title: Preparation of flexible and elastic poly(trimethylene carbonate) structures by stereolithography.
    Author: Schüller-Ravoo S, Feijen J, Grijpma DW.
    Journal: Macromol Biosci; 2011 Dec 08; 11(12):1662-71. PubMed ID: 22006829.
    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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