Investigation of the damping properties of polylactic acid-based syntactic foam structures

Nowadays, environmental awareness is more and important. Therefore, the importance of weight reduction 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 acid-based sheet samples were produced flat extruder at 190 °C. We investigated temperature-dependent mechanical properties samples—they show maximum damping capacity in glass transition region. also examined frequency-dependent successfully extended these time-temperature superposition principle, broaden potential field application homogeneous, closed-cell foam structures increased range 0.1–20 000 Hz as function foaming agent content. sheets from PLA/PBAT (polybutylene succinate) blends. storage modulus unfoamed reference showed decreasing tendency. tan? systems containing only PLA or PBAT blends decreased 25%/75% 50%/50%PBAT/PLA systems, except for 75%/25%PBAT/PLA blend. PBAT/PLA can be used improve ability above 75 wt% PBAT.