Damping properties and transmission loss of polyurethane. II. PU layer and copolymer effect

被引:17
|
作者
Yoon, KH [1 ]
Kim, JG [1 ]
Bang, DS [1 ]
机构
[1] Kumoh Natl Inst Technol, Sch Adv Mat & Syst Engn, Gumi 730701, South Korea
关键词
polyurethane; PU layer; copolymer; damping; transmission loss;
D O I
10.1007/BF02875436
中图分类号
TB3 [工程材料学]; TS1 [纺织工业、染整工业];
学科分类号
0805 ; 080502 ; 0821 ;
摘要
Polyurethane (PU) layer and copolymer consisted of the different molecular weights (1000 and 2000 (g/mol) of poly(propylene glycol) (PPG) were prepared. The damping and mechanical properties of these materials were compared with PU 1000 made by PPG having the molecular weight of 1000 g/mol. The optimum composition of PU2000 used for PU layer and copolymer was diphenylmethane diioscynate (MIC)l)/propylene glycol (PPG)/butanediol (BD) (1/0.3/0.7) based oil the damping and mechanical properties. The damping peak of PU copolymer was higher than those of PU layer and PU 1000 in low temperature range (-30-10degreesC). For application in noise reduction. the transmission loss of the mechanical vibration though solid structure was measured. PU layer and copolymer were used as a damping layer. The transmission loss of PU copolymer was more effective than those of PU layer and PU1000 in the experimental frequency range.
引用
收藏
页码:49 / 53
页数:5
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