Physical Sciences and Mathematics Commons^™

Thermal Analysis As An Important Research Tool For Colleges And Universities, Jeffrey Allen Fruscella

ETD Archive

Three experiments were performed to demonstrate that thermal analysis is an important tool for use in colleges and universities for conducting scientific research. The first experiment used thermogravimetry, differential scanning calorimetry and thermal mechanical analysis to compare polymer resins from two ResinKits®, one from 1994 and the other from 2010. Analysis was done to determine if resins from the 1994 kit were viable standards. The experiments showed significant thermal differences between select resins and it was concluded that resins form the 1994 ResinKit® are no longer acceptable as standards.The second experiment used thermogravimetry and differential scanning calorimetry to determine the …

Novel Thermal Analytical Techniques To Characterize Drugs And Drug Delivery, Lakshmi Swetha Kaza

ETD Archive

This thesis encompasses three significant projects. The study includes the characterization and evaluation of the properties of a commercial contraceptive transdermal patch, Ortho Evra® by Dielectric Analysis and Differential Scanning Calorimetry (DSC). This study helps in monitoring the mobility of the drug and transport properties by Isothermal and Scanning Dielectric Analysis as a function of temperature and frequency. The drugs in this product are norelgestromin and ethinyl estradiol. DSC was used to detect any crystalline character of the drugs by their fusion properties. Having no melting endotherm and detecting a glass transition temperature suggested that the drugs in the patches …

Introduction To Pharmaceutical Thermal Analysis: A Teaching Tool, Shravan Singh Thakur

ETD Archive

Significant Thermal Analysis-physical chemical data needs to be acquired by the new analyst whether an entry level chemist or a new function for the experienced pharmaceutical scientist. This teaching tool describes the introductory use of Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA) and Thermomechanical Analysis (TMA) for characterizing pharmaceuticals. Optimum Experimental conditions for DSC, TGA and TMA will focus on collecting the best results and interpretations. Does the sample contain volatiles? Evaporation creates endothermic peaks, 2 water or solvent can lower the glass transition temperature (Tg) by up to 100°C and affect the crystallization temperature on cooling. The decomposition temperature …

Synthesis And Characterization Of Self-Healing Poly (Carbonate Urethane) Carbon-Nanotube Composites, Roger Wesley Bass

USF Tampa Graduate Theses and Dissertations

Synthesis of high molar mass polycarbonate polyurethanes using a novel polyol is described. The resulting elastomers demonstrate excellent mechanical properties as well as the capability to re-heal after rupture without the addition of additives or imbedded healing agents. The self-healing functionality is shown to greatly improve with the addition of up to 1% single and multi-walled carbon nanotubes. The interface of the carbon nanotubes and self-healing polymer are probed using Raman techniques and provide an insight into how the self-healing actions are improved with the addition of carbon nanotubes.

Synthesis of polycarbonate polyurethanes and carbon nanotube composites using a novel …