Characterization of Polymer Nanocomposites with Thermal Analysis and Spectrum techniques

M.E. Mena Navarro, R.F. Estrada Guerrero, L.A. Torres González, R. Tinajero, L. Palafox
Universidad Iberoamericana Ciudad de Mexico,
Mexico

Keywords: nanocomposite, characterization, TGA, SEM, EDS, polyurethane, flame resistance

Summary:

Polymer nanocomposites have attracted attention in materials science because they exhibit different properties from those of their counterpart polymer microcomposites. An important characteristic is the size of nanoparticles, their effects increase because of their scattering on the total surface area per unit volume [1]. The dispersion and distribution of the nanomaterials into the polymeric matrix depend not only on the compatibility between nanomaterials and the matrix but also on the formulation and production method [2]. In this context, SEM analysis is a surface morphology method for characterization of those nanocomposites or nanomaterials. It can determine the particle size, morphological comparison and elements chemical composition. Pore diameters for polymer matrix could measure to understand the internal nanostructure before and after combustion. Also Energy Dispersive Spectroscopy (EDS) allows one to identify the chemical information of each element detected and their relative proportions [3]. We investigated the characterization of polyurethane nanocomposites based oxide titanium nanoparticles to search a fire resistance property. Were performed a Thermogravimetric Analysis (TGA) of polyurethane nanocomposite in order to establish the thermal stability and their mode of thermal degradation on the internal nanostructure before and after combustion. The TGA thermograms exhibited the fact that nanocomposites have a higher decomposition temperature in comparison with the polyurethane control. As a result, characterizations of nanocomposites are functional tools for application of nanotechnology R&D industrial strategies. TGA, SEM and EDS analyses become complimentary techniques useful for characterization nanocomposites or nanomaterials. Further, these techniques provide information to help derive meaningful relationships between nanostructure and macro scale properties. Polyurethane rigid nanocomposites could be applied on construction or automotive industry looking for safety and sustainability products. References [1] Nilufer Erdem, Aysun A. Cireli, Umit H. Erdogan, Flame Retardancy Behaviors and Structural Properties of Polypropylene/Nano-SiO2 Composite Textile Filaments, Journal of Applied Polymer Science, 2008, 111(4), 2085-2091. [2] Kargarzadeh H., Ahmad I., Thomas S. and Dufresne A., Microscopic Analysis of Cellulose Nanofibril (CNF) and Cellulose Nanocrystal (CNC) Based Nanocomposites, Handbook of Nanocellulose and Cellulose Nanocomposites, 2017, 365-392. [3] Goldstein, J., Newbury, D.E., Joy, D.C., Lyman, C.E., Echlin, P., Lifshin, E., Sawyer, L., Michael, J.R., Scanning Electron Microscopy and X-Ray Microanalysis, 2003, Third Edition.