Applications

As well as inorganic complexes, thermal analysis is applicable to a wide range of substances, e.g. polymers, drugs, soils and coals. It can also be applied to mixtures of, for example, polymer blends.

Degradation of polymers : The effect of heat on polymers varies according to the type of polymer under investigation. In an inert atmosphere, polymeric materials react in two distinct ways: they either depolymerize or carbonize. For example, poly(methyl methacrylate) may degrade back to the monomer.

Soil: The composition of soil is complex and varies with location and geology. Three general stages of soil decomposition on heating can be identified:

1. Loss of moisture and simple organic compounds (between room temperature and 150°C).
2. Ignition of soil organic matter (between 250 and 550°C).
3. Presence of minerals e.g. carbonates. The process can be complicated by the presence of hydrated minerals e.g. aluminium and iron oxides, and micas (above 550°C).

Drugs: The presence of water in both 'free' and 'bound' states in pharmaceuticals can be identified.