Nor Nadirah bt Najib and Zulkifli Mohamad Ariff and Abu Bakar Aznizam and Coswald Stephen Sipaut @ Mohd Nasri (2011) Correlation between the acoustic and dynamic mechanical properties of natural rubber foam: Effect of foaming temperature. Materials and Design, 32 (2). pp. 505-511. ISSN 02613069
|
Text
Correlation_between_the_acoustic_and_dynamic_mechanical_properties_of_natural_rubber_foam.pdf Download (47kB) | Preview |
Abstract
Acoustic absorbing foam materials are produced from dry natural rubber (NR) with the addition of sodium bicarbonate as a blowing agent. The acoustical efficiencies of NR foams were studied, and the results show a significant influence of the viscoelastic and damping properties of the base matrix. Both of these properties are governed by the average cell size, relative density, crosslink density and number of cells per unit volume. The lowest foaming temperature, 140 °C, yielded the NR foam (NR 140) with the highest relative density, crosslink density, smallest average cell size and greatest number of cells per unit volume. Consequently, these foam cell characteristics resulted in a superior sound absorption coefficient and a high storage modulus, which indicates that the NR 140 foam exhibits a better elastic behavior. On the other hand, the NR foam that expanded at 160 °C (NR 160) exhibited great potential for insulating sound and possessed good damping properties, which was characterized by its high transmission loss and tan δ values.
| Item Type: | Article |
|---|---|
| Keyword: | Natural rubber, B. Foam, E. Elastic behavior |
| Subjects: | T Technology > TS Manufactures > TS1-2301 Manufactures > TS1870-1935 Rubber industry |
| Department: | SCHOOL > School of Engineering and Information Technology |
| Depositing User: | ADMIN ADMIN |
| Date Deposited: | 21 Feb 2011 18:00 |
| Last Modified: | 19 Oct 2017 15:50 |
| URI: | https://eprints.ums.edu.my/id/eprint/1758 |
Actions (login required)
 |
View Item |