What is meant by thermal gravimetric analysis?
Thermogravimetric analysis (TGA) is an analytical technique used to determine a material’s thermal stability and its fraction of volatile components by monitoring the weight change that occurs as a sample is heated at a constant rate.
How does thermal gravimetric analysis work?
A TGA analysis is performed by gradually raising the temperature of a sample in a furnace as its weight is measured on an analytical balance that remains outside of the furnace. In TGA, mass loss is observed if a thermal event involves loss of a volatile component.
Why do we use TGA?
The Thermogravimetric Analyzer (TGA) is an essential laboratory tool used for material characterization. TGA is used as a technique to characterize materials used in various environmental, food, pharmaceutical, and petrochemical applications. PerkinElmer is the leader in TGA.
How do you perform a TGA analysis?
Thermogravimetric analysis or thermal gravimetric analysis (TGA) is a method of thermal analysis in which the mass of a sample is measured over time as the temperature changes.
What is the principle of thermogravimetry?
Definitions of Thermogravimetry (TG) A technique in which the mass of the sample is monitored against time or temperature while the temperature of the sample, in a specified atmosphere, is programmed. This is definition of TG by ICTAC.
What is thermogravimetric curve?
Definition: A plot of weight% vs. temperature, usually consisting of a series of steps, obtained by measuring the mass of a sample during heating.
What are the applications of thermal analysis?
Thermal analysis (DSC and TGA) was used to determine temperatures at which drug decomposition occurred and temperatures at which the polymers or polymer blends would melt which is critical in predicting extrusion temperatures that will assure polymer melting yet reduce drug degradation.
What should I know about thermogravimetric analysis of polymers?
This article deals with the history, theory (including mechanisms, equations, variables, and reaction models that influence the TGA measurement), instrumentation, and operating principle of TGA.
How is differential scanning calorimetry used in thermal analysis?
Differential Scanning Calorimetry / Differential Thermal Analysis Krakow 2012/ep Differential Scanning Calorimetry (DSC) is a Thermal Analysis technique in which the heat flow rate (power) to the sample is monitored against time or temperature while the temperature of the sample, in a specified atmosphere, is programmed
When to use TGA in polymeric Ma-forth?
TGA can be used primarily to investigate positional properties (eg, llers, polymer resin, solvents) of the samples. Besides, the weight gain/loss of the samples corresponds to different factors. Generally, tion (9–12). TGA is especially important in applications that use polymeric ma- forth (13).
Why are TGA curves not called fingerprint curves?
TGA Curves are not ‘Fingerprint’ Curves Because most events that occur in a TGA are kinetic in nature (meaning they are dependent on absolute temperature and time spent at that temperature), any experimental parameter that can effect the reaction rate will change the shape / transition temperatures of the curve. These things include: