Theses and Dissertations - UTB/UTPA
Date of Award
Master of Science (MS)
Dr. Javier Macossay-Torres
Dr. John Villarreal
Dr. Philip DeLassus
Three different Polyurethanes (PUs) Lycra®, HydroThaneTM, and BioSpan®, were electrospun and characterized using Scanning electron microscope (SEM), transmission electron microscope (TEM), Fourier transform-infrared spectroscopy (FTIR), & Raman spectroscopy. Nanofiber composites were made by incorporating MWCNTs at three different concentration 0.1wt% 0.5wt% and 1.0wt% to the three PUs. These samples were characterized and mechanical and thermal test were done. The TEM images showed MWCNT bundling in the polymer matrix at the highest concentration, the FTIR showed shifts in characteristic urethane bands indicating an interaction with the polymer and MWCNTs. Mechanical test showed a decrease in the Young’s modulus (E’) in most of the composites with the exception of Bio-MWCNTs 0.1wt%. The thermal gravimetric analysis (TGA) did not show an enhancement in the thermal properties of the polymer when the MWCNTs were added. Indicating that the MWCNTs are weakling the stiffness and the thermal stability of the PUs.
University of Texas-Pan American
Copyright 2012 Travis Cantu. All Rights Reserved.