DAMPING OF MECHANICAL WAVES WITH STYRENE/BUTADIENE RUBBER FILLED WITH POLYSTYRENE PARTICLES: EFFECTS OF PARTICLE SIZE AND WAVE FREQUENCY

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HAGHGOU MAJID; MOHAMMADI NASER; AHMADI MAHDI; FAGHIHI FARHAD; PAZOUKI M.

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Journal: Iranian Journal of Polymer Science and Technology Year:2007 | Volume:20 | Issue:3 (ISSUE NO. 89) Page(s): 227-234

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Title

DAMPING OF MECHANICAL WAVES WITH STYRENE/BUTADIENE RUBBER FILLED WITH POLYSTYRENE PARTICLES: EFFECTS OF PARTICLE SIZE AND WAVE FREQUENCY

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Keywords

DAMPINGQ3

MECHANICAL WAVESQ3

NANOPARTICLESQ3

POLY (BUTADIENE-RAN-STYRENE)Q3

WIDE FREQUENCY RANGQ3

Abstract

Utilizing polymeric materials for DAMPING MECHANICAL WAVES is of great importance in various fields of applications such as military camouflage, prevention of structural vibrational energy transfer, and noise attenuation. This ability originates from segmental dynamics of chain-like polymer molecules. DAMPING properties of styrene-butadiene rubber containing 10 wt% of monosize polystyrene particles with different diameters (from 80 nm to 500 mm) was investigated in the frequency range of vibration, sound, and ultrasound via dynamic mechanical thermal analysis, normal sound adsorption test, and ultrasound attenuation coefficient measurement. The obtained results indicated that for different systems, containing different sizes of polystyrene particles, the area under the DAMPING curve does not show significant change comparing to the neat SBR in the frequency range studied. However, addition of polystyrene particles, specifically nanosized particles, resulted in emergence of a secondary glass transition temperature which could be attributed to the modified dynamics of a layer of matrix molecules near the surface of PS particles. In the range of sound frequency, 0.5 to 6.3 kHz, the maximum DAMPING was observed for the system containing polystyrene NANOPARTICLES. However the single DAMPING curve of neat SBR was separated into two or even three distinct curves owing to the presence of the particles. The maximum DAMPING in the ultrasound frequency range was found for the system containing 0.5 mm polystyrene particles. This is attributed to different contributions from matrix chains dynamics and the reflection of MECHANICAL WAVES from particles-matrix interface at different frequency ranges. On other words, the increase in the glass transition temperature of the elastomeric matrix phase with increasing the mechanical wave frequency causes a reduction in the contribution from matrix chains dynamics while the contribution due to diffraction from dispersed phase increases as the particles size approaches the wavelength of the MECHANICAL WAVES.

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APA: Copy

HAGHGOU, MAJID, MOHAMMADI, NASER, AHMADI, MAHDI, FAGHIHI, FARHAD, & PAZOUKI, M.. (2007). DAMPING OF MECHANICAL WAVES WITH STYRENE/BUTADIENE RUBBER FILLED WITH POLYSTYRENE PARTICLES: EFFECTS OF PARTICLE SIZE AND WAVE FREQUENCY. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 20(3 (ISSUE NO. 89)), 227-234. SID. https://sid.ir/paper/6540/en

Vancouver: Copy

HAGHGOU MAJID, MOHAMMADI NASER, AHMADI MAHDI, FAGHIHI FARHAD, PAZOUKI M.. DAMPING OF MECHANICAL WAVES WITH STYRENE/BUTADIENE RUBBER FILLED WITH POLYSTYRENE PARTICLES: EFFECTS OF PARTICLE SIZE AND WAVE FREQUENCY. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2007;20(3 (ISSUE NO. 89)):227-234. Available from: https://sid.ir/paper/6540/en

IEEE: Copy

MAJID HAGHGOU, NASER MOHAMMADI, MAHDI AHMADI, FARHAD FAGHIHI, and M. PAZOUKI, “DAMPING OF MECHANICAL WAVES WITH STYRENE/BUTADIENE RUBBER FILLED WITH POLYSTYRENE PARTICLES: EFFECTS OF PARTICLE SIZE AND WAVE FREQUENCY,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 20, no. 3 (ISSUE NO. 89), pp. 227–234, 2007, [Online]. Available: https://sid.ir/paper/6540/en

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