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Polymers 2018, 10(9), 946; https://doi.org/10.3390/polym10090946

Structural Design and Sound Absorption Properties of Nitrile Butadiene Rubber-Polyurethane Foam Composites with Stratified Structure

1,2,3
,
1,2
,
1,2
,
1,2
,
1,2
and
1,2,*
1
Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Wuhan Institute of Technology, Wuhan 430205, China
2
College of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
3
Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, China
*
Author to whom correspondence should be addressed.
Received: 3 August 2018 / Revised: 24 August 2018 / Accepted: 24 August 2018 / Published: 25 August 2018
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Abstract

Sound absorbing composites with stratified structures, including double-layer and sandwich structures, were prepared through the combination of nitrile butadiene rubber (NBR) and polyurethane foam (PUFM). The effects of the thickness ratio of layers, different stratified structures and the variety of fillers on the sound absorption performance of the NBR-PUFM composites and the sound absorption mechanism were studied. The results show that the NBR-PUFM composite with a sandwich structure and thickness ratio of 1:8:1 displays good sound absorption, which could be improved further by adding fillers. Because the airflow resistivity, resonance absorption, interface dissipation and interface reflection were combined organically in the sandwich structure, the composites show excellent low-frequency sound absorption performance. Moreover, the composite also has advantages in cost and functionalization aspects. View Full-Text
Keywords: NBR; PU foam; stratified structure; sandwich structure; sound absorption; low frequency NBR; PU foam; stratified structure; sandwich structure; sound absorption; low frequency
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Jiang, X.; Wang, Z.; Yang, Z.; Zhang, F.; You, F.; Yao, C. Structural Design and Sound Absorption Properties of Nitrile Butadiene Rubber-Polyurethane Foam Composites with Stratified Structure. Polymers 2018, 10, 946.

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