Investigation on the mechanical properties of additively manufactured PETG composites reinforced with OMMT nanoclay and carbon fibers

Mahesh, V and Joseph, AS and Mahesh, V and Harursampath, D and Chethan, VN (2021) Investigation on the mechanical properties of additively manufactured PETG composites reinforced with OMMT nanoclay and carbon fibers. In: Polymer Composites .

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Abstract

Polymers and their composites have undergone massive development over the years through intensive research studies. The plethora of opportunities offered by these materials is greatly complimented by the advent of additive manufacturing. The present work analyses the mechanical properties of glycol-modified polyethylene glycol (PETG) reinforced with organically modified montmorillonite (OMMT) nanoclay and short carbon fibers (SCF). This work is the first of its kind to offer a complete overview of the mechanical properties of the composites prepared by these materials through 3D printing without the application of any post-processing techniques. These materials are initially compounded and followed by extrusion using a single-screw extruder to obtain fine filaments of 1.75 mm diameter. The specimens of PETG composite filaments were 3D printed as per the ASTM standards, using fused deposition modeling technique without any post-processing. The fabricated PETG/OMMT/SCF specimens are tested to study its tensile, compression, flexural, impact, and hardness properties. The fractured specimens from the tensile tests are analyzed using a scanning electron microscope. It is seen that the addition of OMMT nanoclay improves the properties of the composites by a significant extent for most of the tests. However, the addition of SCF has a negligible effect on the properties of the composites due to the presence of interstitial voids and poor matrix-fiber bonding. This calls for additional process parameter variations and post-processing techniques like pre-stressing, annealing, and others. These composites can be used in a wide variety of applications ranging from secondary structures in aerospace, automotive applications to minor orthotic and prosthetic applications. © 2021 Society of Plastics Engineers

Item Type:	Journal Article
Publication:	Polymer Composites
Publisher:	John Wiley and Sons Inc
Additional Information:	The copyright of this article belongs to John Wiley and Sons Inc
Keywords:	Additives; ASTM standards; Composite structures; Fiber bonding; Fused Deposition Modeling; Graphite fibers; Nanocomposites; Reinforced plastics; Scanning electron microscopy; Tensile strength; Tensile testing, Automotive applications; Deposition modeling; Organically modified montmorillonite; Post-processing techniques; Process parameter variations; Secondary structures; Short carbon fibers; Single screw extruder, Reinforcement
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	16 Mar 2021 07:49
Last Modified:	16 Mar 2021 07:49
URI:	http://eprints.iisc.ac.in/id/eprint/68232

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