International Journal of Engineering Research

P. Hari Sankar ¹, Y. V. Mohana Reddy ², K. Hemachandra Reddy ³

Affiliations
1 JNTUA, Ananthapuramu-515002, Andhra Pradesh, IN
2 Department of Mechanical Engineering, G. Pulla Reddy Engineering College, Nandyal Road, Kurnool-518007, Andhra Pradesh, IN
3 Department of Mechanical Engineering, Jawaharlal Nehru Technological College of Engineering Anantapur, Ananthapuramu-515002, Andhra Pradesh, IN

Abstract

In the present research a polymer blended hybrid nanocomposites are prepared by mixing of two polymers i.e. polyester and vinylester reinforced with carbon fibre and filled with nanoclay. Hybrid nanocomposites was loaded with different clay weight ratios such as 0, 2, 2.5, 3, 3.5, 4, 5, 6 wt.% using priniciple of hybrid mixtures. By using hand layup technique two different systems such as blend plus clay as the first system and blend plus carbon fibre plus nanoclay is the second system. Tensile strength and tensile modulus were studied on effect of clay loading and miscibility. It was observed that dispersion of clay was uniform and also interactions between fibre and blend were also significantly improved for the second system. Nanoclay wt.% was varied with respect to the blend. It was also observed that tensile strength was increased linearly from 0 wt.% to 3.5 wt.% and then decreases for the first system whereas for the second system linearly increases from the 0 wt.% to 4 wt.% and then decreases. Tensile modulus was optimised at 3.5 wt.% for first system and at 5 wt.% for second system and the reason were attributed that addition of clay increases the modulus but excess clay produces high viscosity that makes difficult to flow the modified mixture.

Keywords

Nanocomposites, Montmorrilonite Nanoclay, Polyester/ Vinylester Blend, Tensile Properties.

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H. Raghavendra Rao ¹, P. Hari Sankar ¹, M. Murali Mohan ¹

Affiliations
1 Department of Mechanical Engineering, G.P.R. Engineering College, Kurnool–518005, IN

Abstract

The chemical resistance of Bamboo/Glass reinforced epoxy hybrid composites to acetic acid, Nitric acid, Hydrochloric acid, Sodium hydroxide, Sodium carbonate, Benzene, Toluene, Carbon tetrachloride and Water was studied. The impact properties of these composites were also studied. The effect of alkali treatment of bamboo fibers on these properties was studied. It was observed that the impact properties of the hybrid composites increase with glass fiber content. These properties found to be higher when alkali treated bamboo fibers were used in hybrid composites. The hybrid fiber composites showed better resistance to the chemicals mentioned above. The elimination of amorphous hemi-cellulose with alkali treatment leading to higher crystallinity of the bamboo fibers with alkali treatment may be responsible for these observations.

Keywords

Bamboo Fiber, Composites, Chemical Resistance, Polyster, Impact Strength, Glass Fiber.

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