Epoxy Resin Literature Study

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3.2 Materials 3.2.1 Matrix Material The matrix material used in this composite preparation is epoxy resin. The trade name of epoxy resin used is LAPOX L-12(3202). A curing agent such as Hardener K-6 is used for accelerated curing of resin at room temperature. The viscosity of epoxy resin is higher than that of hardener. Epoxy resin is blended with hardener in 10:1 ratio. The gel time of the mixture is around 22 minutes. With appropriate fabrication technique, the bubbles formed in the interim of resin hardener mixture can be greatly diminished. Figure 3.5 (a) LAPOX L-12 Epoxy resin (b) Hardener K-6 Table 3.1 Details about Resin and hardener used Constituent Brand Name Chemical Name Density (Kg/m3) Epoxy Resin LAPOX L-12 Diglcyidyl Ether…show more content…
Even the composite mixing ratio with addition of cast iron powder is fixed. Depending upon the total volume of composite specimen to be fabricated, weight fraction of granite particles will be computed. It is then weighed in equal proportion of different grit sizes and then blended together. In the case of composite specimens with the inclusion of filler material, the weight percentage of cast iron particulates will be computed and weighed and mixed with granite particles. Volume of epoxy resin required for the composite mixture is estimated and measured in a measuring jar. Epoxy resin is cascaded into a beaker and mixed with hardener in 10:1 proportion for around one minute. The stirring process is continued until the color of the mixture turns pale yellow. Granite particulate mixture will be then added to the resin and stirred properly for around 10 minutes for uniform blending of composite mixture. This mixture is then filled into the respective moulds before lapsing the gel time of epoxy resin. The cross linking takes place once the gel time is attained and the fabrication process will be…show more content…
The granite particulates chosen vary between a range of mesh sizes 424-599Mic and 53-149 microns. These granules are mixed in 50:50 equal proportions. Specimens are prepared by varying the epoxy percentage in the composites such as 15%, 20%, 30%, 40%, 50%, 60%, 70%, 80% and 100% pure epoxy composite. Also, composite specimens with the inclusion of cast iron particles are fabricated in weight percentages such as 15%, 20%, 25%, 40%, and 50%. The composite mixture prepared will be introduced into the mould cavity and pressurized for compaction. Curing process takes place for 24hours and the specimens are placed in hot air oven at 600C for four hours. Specimens are subjected to testing after seven days of total curing at room conditions. For each ratio four compressive specimens were prepared. The compressive strength and modulus of elasticity of these composites are studied and

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