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Acoustic/mechanical properties of polyurethane composites with syntactic hollow spheres
Author(s) -
Jiang Fengchun,
Yu Tianmiao,
Wang Chunhe,
Cao Mengxin,
Wang Zhenqiang,
Chang Yunpeng,
Guo Chunhuan
Publication year - 2021
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.5182
Subject(s) - polyurethane , materials science , composite material , syntactic foam , spheres , compressive strength , stiffness , absorption (acoustics) , astronomy , physics
In this investigation, a variety of polyurethane composites with different syntactic hollow spheres were prepared by casting method, using 316 L stainless steel hollow spheres and 316 L stainless steel–Al 2 O 3 double‐layer hollow spheres as reinforcements. The sound insulation and absorption properties of polyurethane composites with different syntactic hollow spheres were tested by impedance tube. The effects of the hollow spheres on the acoustic properties of composites were analyzed and compared with polyurethane resin and polyurethane/solid spheres composites. The experimental results reveal that the sound transmission loss of polyurethane can be improved by the addition of hollow spheres, and the range of sound absorption frequency of polyurethane tends to move to lower frequency. Otherwise, the sound insulation and absorption frequency range of polyurethane can be broadened by the effect of 316 L stainless steel–Al 2 O 3 double‐layer hollow spheres. In addition, the compressive strength and stiffness of polyurethane composites have been significantly improved after hollow spheres added. Comparing with polyurethane, the compressive strength and stiffness of PU/316 L–Al 2 O 3 HS increased by 47.9% and 115.9%, respectively.