Volume 12, Issue 4 (1-2017)
J Health Syst Res 2017, 12(4): 454-459 |
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Forouhar -Majd F, Mosayebi M, Rismanchian M, Kohmareh G, Mohammadi Z, Salehian J. Evaluation of Sound Absorption Coefficient of Various Proportions of Nanocomposite Polystyrene/Nanoclay at Different Frequencies. J Health Syst Res 2017; 12 (4) :454-459
URL: http://hsr.mui.ac.ir/article-1-896-en.html
URL: http://hsr.mui.ac.ir/article-1-896-en.html
Farhad Forouhar -Majd 
1, Masoud Mosayebi2 , Masoud Rismanchian3 , Gholamali Kohmareh4 , Zahra Mohammadi2 , Jafar Salehian2
1, Masoud Mosayebi2 , Masoud Rismanchian3 , Gholamali Kohmareh4 , Zahra Mohammadi2 , Jafar Salehian2
1- Assistant Professor, Department of Occupational Health, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
2- MSc Student, Department of Occupational Health Engineering, Student Research Committee, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
3- Assistant Professor, Department of Occupational Health Engineering, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
4- Associate Professor, Department of Polymer Chemistry, School of Chemistry, University of Isfahan, Isfahan, Iran
2- MSc Student, Department of Occupational Health Engineering, Student Research Committee, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
3- Assistant Professor, Department of Occupational Health Engineering, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
4- Associate Professor, Department of Polymer Chemistry, School of Chemistry, University of Isfahan, Isfahan, Iran
Abstract: (1418 Views)
-Background: One way to control sound is the use of sound absorbing materials (especially polymer foams). In recent years, nanocomposite polymers have received much attention because of the improved properties of polymers. In this study, the effects of nanoclay on sound absorption coefficient of polymeric materials have been investigated.Methods: Nanocomposite polystyrene/clay was synthesized using in-situ polymerization technique. For comparison of absorption coefficient, styrene polymer was also synthesized. The synthesized compounds were converted into foam using compression molding. Sound absorption coefficient was determined using impedance tube.Findings: Absorption coefficient of styrene polymer had a peak in the frequency range of 2000 to 4000 Hz. The maximum absorption coefficient (0.75) was observed at a frequency of 2500. With 0.5% nanoclay, the highest absorption coefficient at the frequency of 2500 Hz reached a rate of 0.89. In 3% nanoclay, maximum absorption coefficient at the frequency of 3150 Hz was 0.9. In addition, in 7% nanoclay, maximum absorption coefficient (0.54) was observed at the frequency of 2000 Hz.Conclusion: With the addition of 0.5% nanoclay to polymer, only the height of the frequency peak increased. In 3% nanoclay, in addition to increasing of absorption coefficient, the location of the frequency peak shifted. In 7% nanoclay, with the variation in the frequency peak range, an increase was observed in the absorption coefficient.
Type of Study: Research |
Subject:
education health and promotion
Received: 2020/07/16 | Accepted: 2017/01/15 | Published: 2017/01/15
Received: 2020/07/16 | Accepted: 2017/01/15 | Published: 2017/01/15
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