Optimization Of Processing Parameters To Maximize The Physical And Mechanical Properties Of Natural Rubber Composites For Engine Mount

Abd Ghani, Anis Aqilah (2019) Optimization Of Processing Parameters To Maximize The Physical And Mechanical Properties Of Natural Rubber Composites For Engine Mount. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Natural rubber (NR) composites have abundant benefits and one of its main application is the production of engine mounting. This research focuses on the optimization of processing parameters using Response Surface Methodology (RSM). Testing and analysis have been carried out on NR composites compound provided by company HML Auto Industries Sdn Bhd. The characterization of NR composites compound was done using Fourier Transform Infrared Spectroscopy (FTIR), Electronic Densimeter and Differential Scanning Calorimeter (DSC). Then, design of experiment two-level full factorial is used to plan for the experiments of three process parameters utilizing of hot press obtained from HML Auto Industries Sdn Bhd; temperature (140-180○C), curing time (5-15 minutes) and pressure (100-140kg/cm2). A set of 11 samples was obtained and further tested. Next, physical and mechanical testing were conducted for determination of tensile strength, hardness, swelling characteristics and density. Result shows that sample 7 (S7) (temperature: 140○C, curing time: 15 minutes and pressure: 140kg/cm2) was the best with tensile strength of 21.73MPa, density of 1.21g/cm3, elongation at break of 372.59%, modulus 100% of 5.09MPa, modulus 300% of 17.07MPa, hardness of 15.43 and toluene uptake of 107.69%. While the worst samples were sample 2 (S2) and 8 (S8). S2 (temperature: 180○C, curing time: 5 minutes and pressure: 100kg/cm2) was the worst as it was uncured with tensile strength of 17.25MPa, density of 1.12g/cm3, elongation at break of 388.50%, modulus 100% of 3.35MPa, modulus 300% of 12.51MPa, hardness of 12.83 and toluene uptake of 145.45%. S8 (temperature: 180○C, curing time: 15 minutes and pressure: 140kg/cm2) was the worst too as it was over cured with tensile strength of 18.49MPa, density of 1.11g/cm3, elongation at break of 371.19%, modulus 100% of 3.53MPa, modulus 300% of 13.47MPa, hardness of 8.86 and toluene uptake of 133.33%. Data analysis was further supported with Scanning Electron Microscopy (SEM), FTIR, X-ray diffraction (XRD) and DSC each. Overall, the optimization of processing parameters capable on maximizing the physical and mechanical properties of rubber especially for engine mount.

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