High‐damping polyurethane/hollow glass microspheres sound insulation materials: Preparation and characterization

Abstract

The high-damping property of polyurethane elastomers and the low density of the hollow glass microspheres (HGM) were used to prepare the sound insulation materials in the present work. The transmission loss (TL) was measured to evaluate the HGM content on the sound insulation properties. The experimental results showed that the addition of HGM improved the hardness and compression modulus of the HGM-filled polyurethane composites, and the loss factor (tan δ) of polyurethane composites were greater than 0.9. The average transmission loss (ATL, from 63 to 6300 Hz) reached 37.32 dB when the content of HGM was 10 wt%. The ATL of the HGM-filled polyurethane composites with 15 wt% HGM in the damping control region and the mass control region were 31.94 and 46.78 dB, respectively. The synergistic effect of the microphase separation, the interfacial effect and the rigidity of polyurethane composites resulted in the improvement on sound insulation property. The polyurethane composite has a great potential application for the field of sound insulation materials.

Improved Sound Absorption Properties in Polyurethane Foams by the Inclusion of Al2O3 Nanoparticles

“…It tended to change with frequency or temperature, showing a trend similar to the sound absorption coefficient. Zhang et al [19] designed and successfully prepared a high-damping polyurethane/hollow glass microsphere sound insulation material and measured the loss factor of the polyurethane composite material. In the range of −80 to 60 °C, the loss factor first increased and then decreased.…”

Controllable Design and Preparation of Hydroxyl‐Terminated Solution‐Polymerized Styrene Butadiene for Polyurethane Elastomers with High‐Damping Properties

“…We compare the damping properties of HTSSBR-PUs with those of polyurethane and SSBR composites in previous literatures as displayed in Figure 3. [2,30,31,[34][35][36][37][38][39][40][41][42] It is obvious that HTSSBR-PUs are superior to the common SSBR composites and polyurethane materials in terms of damping performance. Compared to SSBR composites, the hard segments of HTSSBR-PUs are self-reinforcing and require no additional curing process or filler reinforcement.…”

“…Thus, DOI: 10.1002/marc.202100692 damping materials used in industries are still an important research topic. [1][2][3][4][5][6] Moreover, damping materials are widely used in several fields such as aerospace applications, submarine sound absorption, and building materials. [7][8][9] Polymer-damping materials convert mechanical or acoustic energy to thermal energy through viscous internal friction and elastic relaxation to reduce vibration and noise.…”

Self‐healing and chemical resistance polyurethane elastomers based on 2‐ureido‐4[1H]pyrimidinone

“…To characterize the amount of hydrogen bonds, the OMSNIC software was used to fit the split peaks of C O in Figure S4, which followed as the literature. 42 The hydrogen bonding amount (HBA) was calculated via the area of the peaks at 1730 and 1700 cm À1 and the results are shown in Table 1. The HBA values increased gradually with the increasing of the UPy content, demonstrating that the success of UPy's addition.…”