Self-Organization of Macromolecules in Novel TPU-Clay Nanocomposites

Manas Mondal; Pijush Kanti Chattopadhyay; D.K. Setua; N.C. Das; S. Chattopadhyay

doi:10.4028/www.scientific.net/AMR.123-125.435

Paper Titles

Effective Cutoff Wavelength Measurement of Bend-Insensitive Fiber by Longitudinal Misalignment Loss Method
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Electrochemical Deposition of Metallic Lead Particle Film
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Microstructure Analysis of TaN/Cu Nanocomposite Coatings Deposited by Pulsed DC Magnetron Sputtering
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Preparation and Nanomechanical Characterisation of Metal Containing Amorphous Hydrogenated Carbon Nanocomposite Films
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Self-Organization of Macromolecules in Novel TPU-Clay Nanocomposites
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Small Punch Test of LC4/SiC_p Metal Matrix Composites
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Study on Design and Evaluation Method for Transport Packaging Protection
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Temperature Dependent Electrical Properties of Conductive Composites (Behavior at Cryogenic Temperature and High Temperatures)
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Thermal Relaxations of Polymers Revealed by Reversing and Non-Reversing Coefficient of Thermal Expansion
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Self-Organization of Macromolecules in Novel TPU-Clay Nanocomposites

Abstract:

Nanoscale and crystalline morphology of TPU nanocomposites bearing MMT and laponite clays were studied. Laponite was dual modified using ionic and covalent modifications by different silanes. TPU-clay nanocomposites having variegated modified clays, prepared by solution casting, were characterized using TEM, SAXS, variable temperature XRD (VTXRD), and MDSC. TEM show the uniform clay dispersion in MMT nanocomposites as compared to laponite composites. SAXS showed satisfactory fitment of Guinier eqn. at lower q values. Fitment of Porod eqn. is inferior owing to contribution of internal microstructures and interfacial roughness. VTXRD (1400C to 250C at constant cooling rate) and MDSC studies revealed crystalline morphology development in annealed samples that can be related to the aspect ratio, microstructure, and functional grs of clays. The overall crystallinity development is less effected in laponite based composites.