Preparation And Characterization Of Polyurethane Filled Waste Tyre Dust (PU-WTD) Composite Foam For Noise Absorption Medium

Rasmi, Noramalina (2017) Preparation And Characterization Of Polyurethane Filled Waste Tyre Dust (PU-WTD) Composite Foam For Noise Absorption Medium. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Over the years,noise exposure are not being taken seriously in designing a mechanical device in some application such as vehicle parts,transportation or industrial machine.Usually,the noise can be controlled by using an absorption material such as porous material. Polyurethane (PU) was chosen as an absorption material in this research because it has porous structure that were formed by the interaction of polyol and isocyanate.By considering the green environmental and sustainability, Waste Tyre Dust (WTD) are used to reinforce the polymeric based material.This study aim to prepare the PU/WTD composite foam at various WTD loadings (5,15 and 25 wt %) with different stirring period (5, 20 and 35 minutes) for noise absorption medium whereby the parameter of the foam preparation had been optimized based on sound absorption coefficient using Design of Experiment (DOE) software with utilization of two level full factorial design approach.Later,response of the absorption coefficient was correlated with foam morphologies that observed under Scanning Electron Microscope (SEM).From ANOVA analysis, it was postulated that the optimized parametric study of foam preparation are the PU/WTD composite foam prepared with 25 wt % of WTD at 5 minutes of stirring period Meanwhile,the worst parameter of foam preparation are owned by PU/WTD foam that prepared with 25 wt % of WTD at 35 minutes of stirring period.Therefore,the correlation with the foam morphologies was analysed and it was concluded that PU/WTD composite foam with open pore cell structure enhance the sound absorption coefficient rather than closed cell structure.However,these open pore cell structure had reduced the density of the composite foam and decrease the compression strength of the PU foam.In addition,it was analysed that PU/WTD composite foam with more open pore structure could able to absorb more water.

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