Fourier transform infrared spectrometry with thermogravimetry

Spectrometric methods, especially mass sf>ectrometry (MS) and Fourier transform infrared spectrometry (FilR) have been used, often coupled with thermogravimetry. For molecules that are pwlar and of low molar mass, FTIR is particularly useful. For nonpwlar molecules and those of higher molar mass, MS is more adaptable. There are problems, however, in interfacing the thermal analysis instrument operating at atmospheric pressure to the MS operating imder vacuum. This is discussed in Topic F3. 

When decomposition is evidently not simple, with two or more processes being observed to overlap, sufficient information must be obtained to enable the contributions from each of the participating reactions, including secondary reactions between products, to be distinguished. Use of mass spectrometry or Fourier transform infrared spectroscopy coupled with thermogravimetry (see below) allows the evolution of individual gaseous species to be measured as functions of time or temperature. 

Reports on the detailed thermal behaviour of PEEK/HAp composites [as well as other polymer/HAp (nano)composites] are scarce in the literature. Advanced thermal analysis methods, e.g., modulated temperature differential scanning calorimetry (MTDSC) or hyphenated thermoanalytical methods such as thermogravimetry coupled with Fourier transform infrared spectroscopy (TG-FTIR) or mass spectrometry... 

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