Utilization of low hydroxyl content of waste oil polymer foam doped with waste materials for sound absorption application

Sulong, Nurulsaidatulsyida (2011) Utilization of low hydroxyl content of waste oil polymer foam doped with waste materials for sound absorption application. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Bio-monomer were named based on the starting vegetable oils as virgin oil monomer (VOM), 'popia' oil monomer (POM), and mixed oil monomer (MOM). MOM has been identified to have the lowest OH index with 0.093 compared to POM and VOM, meanwhile tensile strength for Virgin Oil Polymer (VOP) shows highest result with 5.69 MPa compared to MOP that is 4.48 MPa. The lowest OH formation with low strength of waste oil was used and utilized for sound absorption application. Bio-polymer composites foams were prepared with different ratio of waste lyre rubber (WTR) and wood dust (WD) fillers by opened mould method (OMM) and closed mould method (CMM) with composite and hybrid fillers loading. By OMM, bio-polymer composite with foaming agent for all percentages of fillers shows high a at medium frequency level (Hz). WTRFMOPlo and WDFMOP7.5 had high potential as an efficient sound absorption material with a approximately equal to 0.95 and 0.9 respectively at 2500 Hz. Bio-polymer composite loading with WTR at different percentages filler loading shows a approximately 1.0 at different frequency level and WTRMOPS shows the highest a that is 0.99 at 3962 Hz. Bio-polymer composite loading with WD at different percentages filler loading shows a is approximately to 1.0 at high frequency above 4000 Hz and WDMOP7.5 shows the highest a that is 0.99 at 5000 Hz. For CMM with composite fillers loading, WTRFMOP,o and WTRFMOP5 shows maximum peak of a around 0.8 while WDFMOPlo shows maximum peak of a around 0.7 meanwhile WTRMOP7 5 and WDMOP2 5 gives a around 0.79 and 0.95 respectively. By increasing the percentage loading of waste fillers and foaming agent, at maximum 10% (by wt/wt of bio-monomer) loading for both filler and foaming agent, evidently, the pores size decreases and less uniform structure comprised of large elongated strips-like pores interconnected by smaller pores of different pore sizes take placed. Meanwhile, increasing waste fillers loading without foaming agent shows a decreased and uneven pores size distribution under Scanning Electron Microscope (SEM). This revealed the influence of foaming agent as stabilizer to the polymeric foam while for fillers loading acts as reactive agent for some bubble nucleants and the surplus is prone to agglomerate and isn't efficient for bubble nucleation for pores formation in the system.

Item Type:Thesis (Masters)
Subjects:T Technology > T Technology (General)
T Technology > TD Environmental technology. Sanitary engineering > TD891-894 Noise and its control
ID Code:2425
Deposited By:Normajihan Abd. Rahman
Deposited On:18 Apr 2012 12:40
Last Modified:18 Apr 2012 12:40

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