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Implantation of Poly(ethyl acrylate) in Mesoporus Poly(styrene-co-divinylbenzene) Microspheres as a Particulate Sound Absorbent

Published online by Cambridge University Press:  01 February 2011

Yeap Hung Ng  and
Liang Hong
Yeap Hung Ng
Affiliation:
Department of Chemical & Biomolecular Engineering, National University of Singapore, 4. Engineering Dr 4, Singapore 117576
Liang Hong
Affiliation:
Department of Chemical & Biomolecular Engineering, National University of Singapore, 4. Engineering Dr 4, Singapore 117576
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Abstract

Porous microspheres of poly(styrene-co-divinylbenzene) (SD) have been synthesized by suspension polymerization. They present a narrow porosity gap (21–24%) and a mean pore-radius range (106–117 Å). The mesoporous voids are then made use as the polymerization reactor for ethyl acrylate (EA), and as a result of the embedded polymerization, linear EA formed is trapped inside the individual particles (SD-EA), and its Tg is brought up to as high as the ambient temperature. Two specific loadings of EA were attained: 11% and 28% by weight. The acoustic absorption behaviors of SD-EA and SD microspheres are assessed by the attenuation coefficient (a = IAttenuated/IIncidence), in which the incident acoustic waves are two arbitrary audio frequency bands, 100–1000 Hz and 4000–5000Hz. In contrast to porous SD microspheres, SD-EA microspheres apparently relax the incident frequencies and attenuate more effectively the higher frequency sound waves. The maximum attenuation level (a) of SD-EA absorbent is about 80% (dB). It was found that the higher EA loading could improve rather slightly the attenuation level in the higher frequency range.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 856: Symposium BB – Multicomponent Polymer Systems-Phase Behavior, Dynamics, and Applications , 2004 , BB10.12
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCE

1. Jarzynski, J., in Sound and Vibration Damping with Polymers, edited by Corsaro, R. D. and Sperling, L. H. (ACS Symposium Series 424, Washington, DC, 1990.), pp. 167–207.Google Scholar
2. Kuttruff, N., Room acoustics, 4th ed. (Elseview Science Publishers Ltd, New York, 2000), ch. 6.Google Scholar
3. Okay, O.: Macroporous copolymer networks. Prog. Polym. Sci. 25, 711–779 (2000).Google Scholar