Plasticizer loading in acoustic encapsulants Journal

  • Plasticizer loading in acoustic encapsulants Journal
  • Plasticizer loading in acoustic encapsulants Journal
  • Plasticizer loading in acoustic encapsulants Journal
  • Can microplastic powder be used to create a porous acoustic structure?
  • It is therefore possible to produce porous structures with very good acoustic properties using this natural low cost material 30, 31. Thus, by combining the bio-bases matrix with the microplastic powder, it was possible to develop an innovative open-cell foam.
  • Can microplastic acoustic materials be used in industrial and civil applications?
  • Evidence is presented of very good acoustic performances and of how the acoustic characteristics of the end product can be customized using different microplastic content and type. This allows envisioning many industrial and civil applications for this novel open-cell material.
  • Does varying microplastics powder ratio affect sound absorption?
  • Varying the type of microplastics powder (PET and PS) within a fixed 1.4 w/v % alginate matrix produces differences in sound absorption. Figure 10 reports the measured frequency trends for both side A and side B. Variation of sound absorption frequency coefficient with varying microplastics powder ratios.
  • How do microplastics change the acoustic properties of open-cell foam?
  • This demonstrates how the used microplastics change the acoustic properties of the open-cell foam by modifying the microstructure of the holes and thus tuning its final acoustic performances. Rare are the examples of acoustic open-cell tuneable foam in the literature.
  • Does glycerol improve acoustic absorption?
  • In contrast, a small quantity of glycerol does improve the acoustic absorption of side B (resistive layer), especially at middle–high frequencies, but when the glycerol concentration is further increased, the performance of this side starts to deteriorate again.
  • Do tuneable acoustic materials have narrow working bands?
  • Chen et al. 52 presented a complete review on tuneable acoustic materials, focusing on metamaterial properties. Outcomes clearly highlight that narrow working bands are provided by these solutions because of their local resonant behaviour, thus preventing most of the practical implementation. Other similar technologies can be applied.

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