TRANSIENT INFRARED-SPECTROSCOPY FOR ONLINE ANALYSIS OF SOLIDS AND VISCOUS-LIQUIDS

Transient infrared spectroscopy (TIRS) is described as a developing te chnology that overcomes sample opacity, thickness and self-absorption problems to gain useful mid-IR spectral information from moving solids and viscous liquids for real-time, on-line process control. The utili ty of the technique is demonstrated by showing examples as diverse as monitoring the cure levels for acrylic coatings on polycarbonate sheet s and monitoring the waste loading percentage for nuclear waste treatm ent by polymer microencapsulation.