Infrared (IR) spectroscopy is a useful technique for characterizing coatings and is a very cost-effective means of gathering information. Even if it's not the final answer, infrared research can point to additional information or techniques needed to solve a problem. Ease of sample preparation is an advantage of IR spectroscopy. There are many ways to present a coating sample to an infrared spectrometer. A wide variety of sampling accessories, or accessories, that can be easily replaced in most spectrometers, enabling the study of liquids and solids under a wide range of conditions. There is an extensive literature on IR methodologies, as well as extensive collections of reference spectra. Nearly all coating components can be identified by infrared spectroscopy; it is especially useful for polymers. Infrared spectroscopy can monitor changes, such as drying, curing, and degradation, that occur in coatings. Infrared spectroscopy can be used to control and monitor the quality of raw materials during coating synthesis and formulation.
Critical to characterizing coatings and studying their performance is the skill of the analytical scientist. This factor is often overlooked because the trend in analytical instrumentation in recent years has been to increase computer control and automation. Even when these systems are at hand, they are of little value without the backing of a well-trained and experienced analytical scientist. For individuals with coating questions or applications, it is recommended to seek the services of an experienced spectroscopic specialist.
