Interactions paper

Interactions paper - A Research Paper on Chemical and...

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Unformatted text preview: A Research Paper on Chemical and Mechanical Interactions between Carbon nanotubes and Polymers in composite materials By Chaitanya Balla Abstract Carbon nanotubes are known to have superior mechanical and chemical properties such as high elastic modulus, tensile strength and chemical inertness. Hence they are considered to be ideal reinforcement to polymers composites to enhance the mechanical and chemical properties. The interactions between these two materials are important indications of the properties of the composite. These interactions can be broadly classified as micromechanical interlocking, chemical bonding between nanotubes and matrix and van der walls forces between the two. Experimental procedures reveal previously unknown interactions such as adsorption of polymer into the walls of CNT, fluorescence and induced doping on the walls of CNTs. This report will go into the details of the various kinds of interactions in the composites and between the layers of the CNT/polymer composite, revealed by various processes conducted on them such as Raman spectroscopy, Fourier transform spectroscopy and force field based molecular dynamics. All these show suggest superior properties of CNT/polymer composites when compared to other types of composite materials. Introduction Since the discovery of multi-wall carbon nanotubes in 1991 by Iijima and subsequent synthesis of single-wall carbon nanotubes by others there have been many experimental and theoretical studies of their electronic, chemical, and mechanical properties. Chemical stability, diverse electronic properties, and predicted extreme strength of the nanotubes have placed them as fundamental building blocks in the rapidly growing field of nanotechnology. Diverse nanoscale device concepts have been proposed to develop nanoscale electronic devices, chemical sensors, and also high strength nanotube composite materials. To realize the proposed devices and the concepts of materials, it is crucial to gain detailed understanding on the fundamental limits of nanotubes diverse properties. Simulations are a very good approach to achieve this goal since we can investigate a large number of possibilities which are often very difficult to understand through experimental studies. The insights and detailed understanding provide valuable guidance principles to improve and develop new nanoscale devices and materials. This paper focuses on the fabrication and the mechanical properties of carbon nanotubes, in the context of high-strength nanotube composite materials. For this purpose, it is important to gain a detailed understanding of the nanotubes mechanical properties, as well as their interaction with the polymer matrix in nanotube-polymer composite materials. Initial atomistic simulations of nanotube mechanics have predicted unusually large Youngs moduli ( of up to 5TPa or 5 times larger than that of diamond ) and elastic limits ( up to 2030% strain before failure ) ....
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This note was uploaded on 07/18/2010 for the course ME 520 taught by Professor Pradosh during the Spring '10 term at Binghamton University.

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Interactions paper - A Research Paper on Chemical and...

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