Supplementary data to the paper: 3D Printing of a Self-Healing Thermo-plastic Polyurethane Through FDM: from Polymer Slab to Mechanical Assessment



The use of self-healing (SH) polymers to make 3D-printed polymeric parts offers the potential to increase the quality of 3D-printed parts and to increase their durability and damage tolerance due to their (on-demand) dynamic nature. Nevertheless, 3D-printing of such dynamic polymers is not a straightforward process due to their polymer architecture and rheological complexity and the limited quantities produced at lab-scale. This limits the exploration of the full potential of self-healing polymers. In this paper, we present the complete process for fused deposition modelling of a room temperature self-healing polyurethane. Starting from the synthesis and polymer slab manufacturing, we processed the polymer into a continuous filament and 3D printed parts. For the characterization of the 3D printed parts, we used a compression cut test, which proved useful when limited amount of material is available. The test was able to quasi-quantitatively assess both bulk and 3D printed samples and their self-healing behavior. The mechanical and healing behavior of the 3D printed self-healing polyurethane was highly similar to that of the bulk SH polymer. This indicates that the self-healing property of the polymer was retained even after multiple processing steps and printing. Compared to a commercial 3D-printing thermoplastic polyurethane, the self-healing polymer displayed a smaller mechanical dependency on the printing conditions with the added value of healing cuts at room temperature.

The dataset contains the following measurements:
- Differential Scanning Calorimetry (DSC) of SH-TPU.
- Filament thickness measurements of the filaments used for 3D printing.
- Fourier Transform Infrared Spectroscopy (FTIR) of SH-TPU in the pristine, filament and 3D printed condition.
- Force-displacement curves of the mechanical testing of SH-TPU and commercial TPU Ninjaflex.
- Rheology results (shear rate analysis and temperature sweep) of SH-TPU and commercial TPU Ninjaflex.
- Thermogravimetric analysis (TGA) of SH-TPU in pristine and filament condition.

The experimental set-up used to obtain these data can be found in the article and has also been included in the .txt files in the folders of the measurements.
Date made available18 Jan 2021
PublisherTU Delft - 4TU.ResearchData
Date of data production18 Jan 2021 - 21 Jan 2021

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