| Title |
Investigation of the damping properties of polylactic acid-based syntactic foam structures |
| ID_Doc |
10402 |
| Authors |
Litauszki, K; Kmetty, A |
| Title |
Investigation of the damping properties of polylactic acid-based syntactic foam structures |
| Year |
2021 |
| Published |
|
| DOI |
10.1016/j.polymertesting.2021.107347 |
| Abstract |
Nowadays, environmental awareness is more and more important. Therefore, the importance of weight reduction and creating a circular economy has increased. In this study, we foamed bio-based polylactic acid (PLA) with thermally expandable microspheres to create homogenous, compostable polymer foams. The polylactic acid-based foamed sheet samples were produced with a flat sheet extruder at 190 degrees C. We investigated the temperature-dependent mechanical properties of the samples-they show maximum damping capacity in the glass transition region. We also examined the frequency-dependent properties of the foamed samples and successfully extended these properties with the time-temperature superposition principle, to broaden the potential field of application of the foams. The damping properties of homogeneous, closed-cell foam structures produced with thermally expandable microspheres increased in the range of 0.1-20 000 Hz as a function of foaming agent content. We also produced foamed sheets from PLA/PBAT (polybutylene succinate) blends. The storage modulus of unfoamed reference samples showed a decreasing tendency. The tand of foamed systems containing only PLA or PBAT increased. The tand of foamed blends decreased in 25%/75% and 50%/50%PBAT/PLA systems, except for the 75%/25%PBAT/PLA blend. Therefore, PBAT/PLA blends can only be used to improve the damping ability of foamed samples above 75 wt% PBAT. |
| Author Keywords |
Damping; Syntactic foam; Polylactic acid; Extrusion; Physical blowing agent |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000703726800006 |
| WoS Category |
Materials Science, Characterization & Testing; Polymer Science |
| Research Area |
Materials Science; Polymer Science |
| PDF |
https://doi.org/10.1016/j.polymertesting.2021.107347
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