FTIR emission spectroscopy applied to polymer degradation

Kinetics of the Thermal and Thermo-Oxidative Degradation of Polystyrene, Polyethylene and Poly(propylene)

“…This mechanism has been shown to occur using Fourier transform infrared spectroscopy. [58] Polyethylene The TGA data shows (Figure 2) a small increase in the sample mass, which occurs prior to degradation. The increase is likely to be caused by the formation of a small amount of the polymer oxide.…”

Thermal degradation of Poly(methyl methacrylate) with a 1.064 μm Nd:YAG laser in a buoyant flow

“…As summarized in Table 1, we can identify in the LWIR, combination of CeH and CeOeC deformation at 811 cm À1 , out of plane bending peaks for ¼ CH at 938 and 1015 cm À1 , CeO stretching at 1159 and 1202 cm À1 , CH 3 -bending peaks at 1308 and 1446 cm À1 , a C]C stretching peak at~1632 cm À1 , a C]O stretching peak at 1737 cm À1 , and atmospheric H 2 O absorption overlapping with the C]C and C]O stretching peaks from~1330 to 1800 cm À1 . Similar spectral bands for the emission of MMA has been reported elsewhere from thermally decomposed PMMA [7,30,31]. The LWIR bands are analyzed semi-quantitatively in an effort to investigate the presence of other molecular species in the plume.…”

“…Fourier transform infrared (FTIR) spectroscopy has been used previously to investigate the time dependent thermal degradation of polymers [7]. Recently, imaging Fourier transform spectroscopy (IFTS) demonstrated the ability to monitor the thermal decomposition products from laser irradiated fiberglass reinforced polymers at high spatial resolutions (0.81 mm 2 per pixel) [8].…”

Spectroscopic probes for real-time monitoring of polymer modification and degradation reactions

“…Laboratory studies of FT-IR emission [28,29] have demonstrated that it may provide real-time oxidation profiles. This should be adaptable to on-line analysis by using the transient IR emission methodology developed by Jones et al [30,31] for other applications.…”