Introduction:
The
Thermogravimetric Analyzer (TGA) is a very important advanced instrument used
for material characterization. TGA is used for materials testing/plastic
testing/ rubber testing / polymer testing needed in various environmental,
food, pharmaceutical, and petrochemical and polymer/plastic / rubber /
composite applications. Thermogravimetric
analysis or Thermal Gravimetric Analysis (TGA) can help us in determining the moisture content/Volatiles, inorganic, organic components, additives,
decomposition points and degradation temperatures. In TGA analysis of plastics/rubber/polymer/any
material, mass loss with respect to the temperature is measured with an advance
inbuilt thermobalance which can go as high as up to 1100C.
Working/Principle:
ThermogravimetricAnalysis / TGA Analysis is a technique wherein the mass loss of a material is
measured as a function of temperature or time. During TGA testing the sample
specimen is subjected to a controlled temperature program in a controlled
atmosphere either in Nitrogen or Oxygen or Air.
A TGA
mainly comprises of a sample pan that is held on by an ultra precision thermo balance.
That pan is surrounded in a furnace and is heated or cooled during the
experiment. The mass of the sample is measured during the testing. A sample
purge gas controls the sample environment. This gas may be inert or a reactive
gas that flows over the sample and exits through an exhaust. During TGA testing
of Plastics/rubber/polymer/composites, Chemical reactions, such
as combustion, involve mass losses, whereas physical changes, such as melting,
do not. The sample mass loss is plotted against temperature or time axis
to present the thermal transitions in the plastics Plastics/rubber/polymer/composites – such as Volatile loss, Moisture loss, polymer burning loss and finally,
decomposition of the material.
1.2 Application:
Typical TGA on Plastics/rubber/polymer/composites applications include:
§ Filler content of polymer resins
§ Volatile
Organic Content (VOCs)
§ Carbon black content
§ Decomposition temperature
§ Moisture content
§ Plasticizer content in polymers
§ Oxidative stability
§ Performance of stabilizers
§ Low molecular weight monomers in polymers
|
Step
|
Item
|
Result
(%)
|
|
1
|
Epoxy Resin
|
39.60
|
|
2
|
Residue / Glass
|
60. 40
|
Image 1: TGA Thermogram
We at FAN SERVICES – Advance Materials Testing and
Research Lab can help you with advanced Plastics/rubber/polymer/composites testing and can help you in
solving your plastic related problems. Our TGA Testing instruments are worldclass
completely automized with Smaple Robots and can provide you with the highest
level of accuracy in TGA plastic testing. FAN SERVICES has been in the field of
materials testing since 1980 and our decades of dedicated plastic testing
experience can certainly help you. In the past we have provided plastic TGA
Testing lab services to many national and international clients from around the
world including clients from Mumbai, Pune, Nashik, Aurangabad, Nagpur,
Ahmedabad, Rajkot, Sanand, Vadodara, Vapi, Daman and Diu, Chennai, Hyderabad,
Bangalore, Coimbatore, Delhi, Kolkata, Indore, Vijaywada, Gurgaon, Chandigarh
and Thiruvanantapuram in India.
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