TGA means "Thermogravimetric Analysis".What is TGA?, Principal Of TGA, How it Works?, Application and Characterization.

1. COMPREHENSIVE
EVALUATION ASSIGNMENT
TOPIC: TGAANALYSIS
SUBMITTED BY:
JEELKUMAR PATEL(18BCL039)

2. •“Thermogravimetry(TG) is the branch of thermal analysis which examines the mass change of a
sample as a function of temperature or as a function of time.”
•“Thermogravimetric analysis(TGA) is a method of thermal analysis in which changes in physical
and chemical properties of materials are measured as a function of increasing temperature or as a
function of time.”
WHAT IS TGA?

3. •“It is a technique whereby the weight of the substance, in an environment heated or cooled at a
controlled rate, is recorded as a function of time or temperature.”
•Changes in the mass of a sample are studied while the sample is subjected to a program.
•Changes in temperature affect the sample. Not all thermal changes/events bring change in mass
of sample i.e. melting, crystallization but some thermal events i.e. desorption, absorption,
sublimation, vaporization, oxidation, reduction and decomposition bring a drastic change in mass
of sample.
•It is used in analysis of volatile products, gaseous products lost during the reaction in
thermoplastics, thermosets, elastomers, composites, films, fibres, coatings, paints, etc.
PRINCIPAL OF TGA:-

4. •Instrument used for thermogravimetry is “Thermobalance”. Data recorded in form of curve
known as ‘Thermogram’.
•The furnace can raise the temperature as high as 1000°C which is made of quartz.
•The auto sampler helps to load the samples on to the microbalance.
•The thermocouple sits right above the sample.
•Care should be taken at all times that the thermocouple is not in touch with the sample which is
in a platinum pan.
HOW IT WORKS?

5. •A technique measuring the variation in mass of a sample undergoing temperature scanning in a
controlled atmosphere.
•Thermobalance allows for monitoring sample weight as a function of temperature.
•The sample hangs from the balance inside the furnace and the balance is thermally isolated from
the furnace.
A

6. Corrosion
APPLICATION:-

7. Thermal Stability

8. Glass Transition

9. TGA in Automotive industry

10. Sorption Analysis

11. Weight loss
Weight gain
Thermal stability
Material purity
Determination of humidity
All of these are kinetic processes
CHARACTERIZATION:-