Dataset for 'Semiempirical Condensed Structure Analysis and Quantification of Disorder for Extrusion-printed Polylactide Filaments'
Description
This dataset supports the manuscript entitled “Semiempirical condensed structure analysis and quantification of disorder for extrusion-printed polylactide filaments”. The dataset includes raw characterization data from differential scanning caloremetry (DSC), dynamic mechanical thermal analysis (DMA), and wide angle X-ray scattering (WAXS). All the PLA filaments were extrusion-printed on a commercial 3D printer (3D-Bioplotter Developer, EnvisionTEC, Germany), and further post-treated by cold crystallization. We fabricated two groups of PLA filaments. Group (1) were printed at a fixed printing speed of 1 mm/s with fine-tuning of the printing pressure, and cold crystallized at 80°C for 0 hrs, 0.5 hrs, 1 hrs, 1.5 hrs, ... ,4.5 hrs, 12 hrs, and 24 hrs. Group (2) were printed at fixed pressure of 8 bars under gradually increased printing speeds from 10 mm/s to 100 mm/s at 10 mm/s intervals, and then cold crystallized at 80°C for 24 hrs.
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Steps to reproduce
DMA Q800 (TA Instruments, Waters Ltd.) was used for dynamic mechanical thermal analysis (DMTA) on the glass transition behavior of the amorphous phase. PLA filaments were broken into appropriate lengths of ~7 mm and mounted onto the paper frames with 5 mm gauge length, and clamped carefully into the tension film clamps. The instrument temperature calibration method was referenced to the previous work33 before testing. The main parameters were set as follows: temperature ramp rate 3 ℃∙min-1 from room temperature to 120 ℃; dynamic frequency 1 Hz; dynamic oscillation strain 0.1%. The cross-sectional area of the PLA filaments was measured using optical microscopy and analyzed using ImageJ software. Differential scanning calorimetry (DSC) tests were conducted on a STA-449F3 model (NETZSCH, Germany). Samples weighing 5-10 mg were used and an empty aluminum crucible was used as a reference. The temperature ramp rate was 10 ℃∙min-1 to 210 ℃ under argon atmosphere. Wide angle X-ray Scattering (WAXS) measurements were performed on a Xeuss 3.0 HR instrument (Xenocs, France). PLA filaments were attached vertically to the sample holder. The distance from the detector to the PLA filaments was 120 mm and the test time for a single sample was 30 s, and the two-dimensional (2D) WAXS images were obtained. Each 2D WAXS image was integrated along the equatorial and meridian directions to obtain the intensity (I) - scattering vector (q) curve. The raw data can be processed using softwares such as Origin to produce plots.
Institutions
- Beihang UniversityBeijing, Beijing