Damping properties and transmission loss of polyurethane. II. PU layer and copolymer effect
- Authors
- Yoon, KH; Kim, JG; Bang, DS
- Issue Date
- Jun-2003
- Publisher
- KOREAN FIBER SOCIETY
- Keywords
- polyurethane; PU layer; copolymer; damping; transmission loss
- Citation
- FIBERS AND POLYMERS, v.4, no.2, pp 49 - 53
- Pages
- 5
- Journal Title
- FIBERS AND POLYMERS
- Volume
- 4
- Number
- 2
- Start Page
- 49
- End Page
- 53
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/27026
- DOI
- 10.1007/BF02875436
- ISSN
- 1229-9197
1875-0052
- Abstract
- 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.
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