Utilization of low hydroxyl content of waste oil polymer foam doped with waste materials for sound absorption application
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) s...
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| Format: | Thesis |
| Published: |
2011
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/2425/ http://eprints.uthm.edu.my/2425/1/Nurulsyaidatulshida.pdf |
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| Summary: | 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. |
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