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Evolved Gas Analyzer (EGA, coupled to Thermal Analyzer)
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Glossary
ServicesContract TestingThermogravimetric Analysis (TGA)

methods

Thermogravimetric Analysis (TGA) 

What is Thermogravimetry?

Thermogravimetric analysis is a method of thermal analysis in which the mass of a sample is measured over time as the temperature changes. This measurement provides information about physical phenomena, such as Phase TransitionsThe term phase transition (or phase change) is most commonly used to describe transitions between the solid, liquid and gaseous states.phase transitions, absorption and desorption; as well as chemical phenomena including thermal Decomposition reactionA decomposition reaction is a thermally induced reaction of a chemical compound forming solid and/or gaseous products. decomposition, and Solid-Gas ReactionsSolid-gas reactions are a type of heterogeneous solid-state reaction occurring when a reactive solid is exposed to a stream of reactive gas. Typical examples of solid-gas reactions are sorption and corrosion of metals.solid-gas reactions (e.g., OxidationOxidation can describe different processes in the context of thermal analysis.oxidation or reduction).

Lab Contact
  • Mass changes
  • Identification
  • Compositional analysis
  • Decomposition reactionA decomposition reaction is a thermally induced reaction of a chemical compound forming solid and/or gaseous products. Decomposition
  • OxidationOxidation can describe different processes in the context of thermal analysis.Oxidation
  • Thermal stability
  • Reduction behavior
  • Thermal Corrosion StudiesThermal corrosion or high-temperature corrosion is a chemical interaction of a material (typically a metal) with the surrounding gas atmosphere as a result of heating.Corrosion studies
  • Determination of filler content
  • Influence of aging
  • Determination of plasticizer content and other additives
  • Determination of moisture content
  • Determination of Ash ContentThe ash is a measure of the mineral oxide content on a weight basis. Thermogravimetric analysis (TGA) in an oxidative atmosphere is a well-proven method to determine the inorganic residue, commonly referred to ash, in organic materials such as polymers, rubbers, etc. Therefore, the TGA measurement will identify if a material is filled and calculates the total filler content.ash content
  • Determination of Added Carbon BlackCarbon black acts as a reinforcing filler in tires and other rubber products. In other materials such as plastics, paints, and inks, carbon black is used as a color pigment or as filler to achieve electric conductivity.added carbon black
  • Curie temperatures
  • Reaction kinetics
Temperature range-180 to 2400°C
Heating rate0.001 K/min to 200 K/min
Max. sample weight/measuring range2 g (including crucible)
Gas atmospheresInert, oxidizing, reducing, measurements under vacuum (for tests such as rubber analysis)
Sample DimensionsCrucible volume up to 350 µl

Determination of the Glass Fiber Content in PA66

Polyamide 66 is a thermoplastic polymer which is used for a wide variety of technical parts.
The stiffness of the PA66 can be increased by suitable fillers such as glass fibers. TGA allows for determination of not only the Decomposition reactionA decomposition reaction is a thermally induced reaction of a chemical compound forming solid and/or gaseous products. decomposition of the polymer, but also the precise glass fiber content (residual mass 20.2% at 989°C).
After switching from nitrogen to synthetic air, the TGA curve also shows the content of pyrolytic soot and Added Carbon BlackCarbon black acts as a reinforcing filler in tires and other rubber products. In other materials such as plastics, paints, and inks, carbon black is used as a color pigment or as filler to achieve electric conductivity.added carbon black. The c- DTA® peak exhibits the melting peak of PA66 at 260°C (red curve).

More Applications 

  • TGA Measurements By Means of the BeFlat® Correction
    Application Note
  • TGA Measurements on Calcium Oxalate Monohydrate
    Application Note

NETZSCH TGA Systems

  • TG 209 F1 Libra®
  • TG 209 F3 Tarsus®
  • STA 449 F1 Jupiter®
  • STA 449 F3 Jupiter®
  • STA 449 F5 Jupiter®
  • STA 2500 Regulus

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